Brief Records : EPA National Library Catalog

Items Found: 503
Showing Items: 301 - 325
Your Search: (AUTHOR=THOMAS AND R)

PREV 1 ... 8 9 10 11 12 13 14 15 16 17 18 ... 21 NEXT
Document Number: 301 Full Record
Main Title Methods for Pulp and Paper Mill Sludge Utilization and Disposal.
Author Aspitart, Thomas R. ; Rosenfiel, Alan S. ; Smal, Bernard C. ; Amber, Herman R. ;
CORP Author Crown Zellerbach Corp., Camas, Wash. Environmental Services Div.
Year Published 1973
Report Number EPA-12040-ESV; 12519,; R2-73-232
Stock Number PB-222 254
Additional Subjects ( Industrial waste treatment ; Pulps) ; ( Solid waste disposal ; Pulps) ; ( Sludge disposal ; Paper industry) ; Pulp mills ; Paper mills ; Water pollution ; Incinerators ; Combustion ; Boilers ; Fuels ; Soil stabilization ; Cost estimates ; Feasibility ; Utilization ; Fertilizing ;
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB-222 254 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 145p

Document Number: 302 Full Record
Main Title Microbial Activity in Subsurface Samples Before and during Nitrate-Enhanced Bioremediation.
Author Thomas, J. M. ; Gordy, V. R. ; Bruce, C. L. ; Hutchins, S. R. ; Sinclair, J. L. ;
CORP Author National Risk Management Research Lab., Ada, OK. Subsurfaces Protection and Remediation Div. ;Rice Univ., Houston, TX. ;ManTech Environmental Technology, Inc., Ada, OK.
Publisher 1995
Year Published 1995
Report Number EPA/600/A-95/109;
Stock Number PB95-274239
Additional Subjects Water pollution control ; Jet engine fuels ; Aquifers ; Biotechnology ; Microbial degradation ; Biological treatment ; Ground water ; Denitrification ; Waste treatment ; Anaerobic processes ; Nitrates ; Hydrocarbons ; Ecology ; Microorganisms ; Protoza ; Bacteria ; JP-4 jet fuel ; MPN ; Bioremediation
Internet Access
Description Access URL
https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=P100VIJM.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB95-274239 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 17p

Document Number: 303 Full Record
Main Title Microbiological aspects of biofilms and drinking water /
Author Percival, Steven L.
Other Authors
Author Title of a Work
Walker, James Thomas.
Hunter, Paul R.
Publisher CRC Press,
Year Published 2000
OCLC Number 43186076
ISBN 084930590X; 9780849305900
Subjects Biofilms ; Drinking water--Microbiology ; Biofilms--growth & development ; Risk Factors ; Water Supply
Internet Access
Description Access URL
Publisher description http://catdir.loc.gov/catdir/enhancements/fy0646/99098186-d.html
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJDM  QR100.8.B55P47 2000 Env Science Center Library/Ft Meade,MD 08/15/2016
Collation 229 pages : illustrations ; 24 cm.

Document Number: 304 Full Record
Main Title Modeling remedial actions at uncontrolled hazardous waste sites /
Author Boutwell, S. H. ; Brown, S. M. ; Roberts, B. R. ; Atwood, D. F.
Other Authors
Author Title of a Work
Boutwell, S. H.
Ammon, Douglas C.
Barnwell, Thomas O.
CORP Author Environmental Research Laboratory (Athens, Ga.)
Publisher Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency ; Available from the National Technical Information Service,
Year Published 1985
Report Number EPA/540/2-85/001; 68-03-3116; EPA-68-03-3116
Stock Number PB85-211357
OCLC Number 12157961
Subjects Hazardous waste sites--United States
Additional Subjects Hazardous waste sites--United States ; Hazardous materials ; Sites ; Water pollution control ; Assessments ; Soils ; Mathematical models ; Surface waters ; Subsurface drainage ; Water wells ; Ground water ; Seepage ; Fluid infiltration ; State government ; Pumping ; National government ; Hydraulics ; Drawdown ; Water table ; Uncontrolled sites ; Super fund ; Path of pollutants
Internet Access
Description Access URL
https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=2000DBPE.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EHAM  TD811.5.M62 Region 1 Library/Boston,MA 04/29/2016
EIAD  EPA/540/2-85/001 Region 2 Library/New York,NY 05/30/2003
EJBD  EPA 540-2-85-001 Headquarters Library/Washington,DC 01/09/2014
ELBD ARCHIVE EPA 540-2-85-001 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023 DISPERSAL
EMBD  EPA/540/2-85/001 NRMRL/GWERD Library/Ada,OK 09/17/1993
ERAD  EPA 540/2-85-001 Region 9 Library/San Francisco,CA 08/16/2012
ESAD  EPA 540-2-85-001 Region 10 Library/Seattle,WA 03/23/2010
NTIS  PB85-211357 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 1 volume (various pagings) : illustrations, maps, charts ; 28 cm

Document Number: 305 Full Record
Main Title Monitoring Integrated Energy Systems at a Wastewater Treatment Plant in Maine.
Author Fuller, D. R. ; Wilke, D. A. ; Thomas, P. L. ; Lisa, A. J. ;
CORP Author Wright-Pierce, Topsham, ME.;Municipal Environmental Research Lab., Cincinnati, OH.
Year Published 1984
Report Number EPA-68-03-2587; EPA-600/2-84-102;
Stock Number PB84-197292
Additional Subjects Solar energy ; Sewage treatment ; Monitoring ; Solar heating ; Systems engineering ; Economic analysis ; Design ; Heat recovery ; Energy consumption
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB84-197292 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 140p

Document Number: 306 Full Record
Main Title Montour Waste Heat Greenhouse Project.
Author Johnson, Robert P. ; Bryfogle, Jr., Kenneth G. ; Mears, David R. ; Manning, Thomas O. ;
CORP Author Pennsylvania Power and Light Co., Allentown.
Year Published 1982
Stock Number PB82-228339
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB82-228339 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 14p

Document Number: 307 Full Record
Main Title Mourning dove : Zenaida macroura /
Author Mirarchi, R. E.
Other Authors
Author Title of a Work
Baskett, Thomas S.
Publisher American Ornithologists' Union ; Academy of Natural Sciences,
Year Published 1994
OCLC Number 31696366
Subjects Mourning dove ; Columbidae ; Vogels
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EHBM  QL681.B625 no.117 1994 CEMM/ACESD Library/Narragansett,RI 04/08/2013
Collation 32 p. : ill. (some col.), maps (some col.) ; 28 cm.

Document Number: 308 Full Record
Main Title National Industrial Wastewater Assessment, Manufacturing Year 1963.
Author Powers, II, Thomas J. ; Sack, Bernard R. ; Holdawa, James L. ;
CORP Author Federal Water Pollution Control Administration, Cincinnati, Ohio.
Year Published 1969
Stock Number PB-230 128
Additional Subjects Stream pollution ; Industrial wastes ; Sewage ; Waste water(Pollution) ; Water utilization
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB-230 128 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 29p

Document Number: 309 Full Record
Main Title National surface water survey : eastern lake survey phase II : northeastern lakes, database dictionary /
Other Authors
Author Title of a Work
Jimenez, Michele M.
Whittier, Thomas R.
Herlihy, Alan T.
Publisher U.S. Environmental Protection Agency,
Year Published 1990
Report Number EPA/600/3-91/028; 68-03-3439; 68-C8-0006
OCLC Number 25381477
Subjects Water--Sampling--Environmental aspects--United States
Internet Access
Description Access URL
https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=2000IEMX.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EIAD  EPA/600/3-91/028 Region 2 Library/New York,NY 10/24/1997
EJAD  EPA 600/3-91-028 Region 3 Library/Philadelphia, PA 04/03/1992
EJBD  EPA 600/3-91/028 c.1 Headquarters Library/Washington,DC 05/02/2014
EKCD  EPA/600/3-91/028 CEMM/GEMMD Library/Gulf Breeze,FL 07/17/2018
ELBD ARCHIVE EPA 600-3-91-028 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD  EPA 600-3-91-028 AWBERC Library/Cincinnati,OH 12/18/1998
EMBD  EPA/600/3-91/028 NRMRL/GWERD Library/Ada,OK 12/24/1992
ESAD  EPA 600-3-91-028 Region 10 Library/Seattle,WA 03/23/2010
Collation vi, 85 pages

Document Number: 310 Full Record
Main Title Nationwide occurrence of radon and other natural radioactivity in public water supplies /
Author Horton, Thomas R.
CORP Author Eastern Environmental Radiation Facility, Montgomery, AL.
Publisher U.S. Environmental Protection Agency, Office of Radiation Programs, Eastern Environmental Radiation Facility,
Year Published 1985
Report Number EPA/520-5-85-008
Stock Number PB86-162443
OCLC Number 13661742
Subjects Radon
Additional Subjects Radon ; Water pollution ; Radioactive contaminants ; Potable water ; Sources ; Concentration(Composition) ; Public health ; Water pollution control
Internet Access
Description Access URL
https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=9101XTU3.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
ELBD ARCHIVE EPA 520-5-85-008 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ERAD  EPA 520/5-85-008 Region 9 Library/San Francisco,CA 07/16/2012
ESAD  EPA 520-5-85-008 Region 10 Library/Seattle,WA 04/15/2005
NTIS  PB86-162443 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xxiii, 208 pages : illustrations ; 28 cm

Document Number: 311 Full Record
Main Title Neanthes long-term exposure experiment further evaluation of the relationship between juvenile growth and reproductive success /
Author Johns, D. M. ; Ginn, T. C. ; Ciammaichella, R. ; Johns, D. Michael.
Other Authors
Author Title of a Work
Johns, D. Michael.
Ginn, Thomas C.
Ciammaichella, Rita
CORP Author PTI Environmental Services, Bellevue, WA.;Environmental Protection Agency, Seattle, WA. Puget Sound Estuary Program.
Publisher PTI Environmental Services,
Year Published 1991
Report Number EPA-910-9-91-026; EPA-68-D8-0085; PB92166891
Stock Number PB92-166891
OCLC Number 30805598
Subjects Polychaeta
Additional Subjects Sediments ; Worms ; Toxicity ; Reproduction(Biology) ; Growth ; Water pollution effects(Animals) ; Inorganic compounds ; Organic compounds ; Bioassay ; Elliot Bay ; Puget Sound ; Dose-response relationship ; Tests ; Exposure ; Tables(Data) ; Biomass ; Neanthes arenaceodentata ; Puget Sound Estuary Program
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
ESAD  EPA-910-9-91-026 5 copies Region 10 Library/Seattle,WA 06/09/2016
NTIS  PB92-166891 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation iv, 18 p. : ill. ; 28 cm.

Document Number: 312 Full Record
Main Title Neurohormonal techniques in insects /
Other Authors
Author Title of a Work
Miller, Thomas A.
Aston, R. J.
Publisher Springer-Verlag,
Year Published 1980
OCLC Number 05893616
ISBN 0387904514; 9780387904511; 3540904514; 9783540904519
Subjects Insect hormones ; Neurosecretion ; Analyse--(DE-588)4122795-5 ; Insekten--(DE-588)4027110-9 ; Neurohormon--(DE-588)4125626-8
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
ELBM  QL495.N48 1980 AWBERC Library/Cincinnati,OH 05/23/2003
Collation xxiv, 282 pages : illustrations ; 25 cm.

Document Number: 313 Full Record
Main Title Neuse River Estuary Modeling and Monitoring Project Stage 1: Network Analysis for Evaluating the Consequences of Nitrogen Loading.
Author Christian, R. R. ; Thomas, C. R. ;
CORP Author North Carolina Water Resources Research Inst., Raleigh. ;East Carolina Univ., Greenville, NC. Dept. of Biology.;North Carolina Dept. of Environment and Natural Resources, Raleigh.;Environmental Protection Agency, Washington, DC.
Publisher Jun 2000
Year Published 2000
Report Number UNC-WRRI-2000-325-F;
Stock Number PB2001-101563
Additional Subjects Estuaries ; Eutrophication ; Nutrient loading ; Network analysis ; Nitrogen ; Algorithms ; Material flows ; Recycling ; Biogeochemical cycling ; Modeling ; Neuse River ; Ecological network analysis
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB2001-101563 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 66p

Document Number: 314 Full Record
Main Title Nitrosamines in vehicle interiors [Microfiche] /
Author Smith, Lawrence R.
Other Authors
Author Title of a Work
Baines, Thomas M.
CORP Author Southwest Research Inst., San Antonio, TX.;Environmental Protection Agency, Ann Arbor, MI. Emission Control Technology Div.
Publisher Society of Automotive Engineers,
Year Published 1981
Report Number EPA-68-03-2884; EPA-460/3-81-029
Stock Number PB82-125014
OCLC Number 48497607
Subjects Nitrosoamines ; Nitrosoamines--Carcinogenicity ; Environmental impact analysis ; Nitrosoamines--Toxicology ; Nitrosamines ; Nitrosamines--Carcinogenicity ; Nitrosamines--Toxicology
Additional Subjects Amines ; Nitroso compounds ; Air pollution ; Motor vehicles ; Samplers ; Exposure ; Laboratory equipment ; Tests
Internet Access
Description Access URL
https://nepis.epa.gov/Exe/ZyPdf.cgi?Dockey=94002NU4.pdf
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
ELCD  EPA 460/3-81-029 NVFEL Library/Ann Arbor, MI 12/27/2016
NTIS  PB82-125014 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 19 pages : illustrations ; 28 cm.

Document Number: 315 Full Record
Main Title Northern frontier, northern homeland : the report of the Mackenzie Valley Pipeline Inquiry.
Other Authors
Author Title of a Work
Berger, Thomas R.
CORP Author Mackenzie Valley Pipeline Inquiry (Canada)
Publisher Minister of Supply and Services,
Year Published 1977
OCLC Number 06023499
Subjects Mackenzie Valley Pipeline (NWT)
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJBM  TN880.5.C28 v.1-2 Headquarters Library/Washington,DC 01/27/2006
Collation 2 v. : ill. ; 28 cm.

Document Number: 316 Full Record
Main Title Northern Great Plains aquatic assessment /
Other Authors
Author Title of a Work
Johnson, Thomas R.
Publisher U.S. Environmental Protection Agency,
Year Published 1998
Report Number EPA - Z-883; EPA-600/R-98-205
OCLC Number 76903989
Internet Access
Description Access URL
https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=91007N6L.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJBD  EPA Z-883 ARCHIVE Headquarters Library/Washington,DC 02/17/2016
EKBD  EPA/Z-883 Research Triangle Park Library/RTP, NC 12/08/2006
ELBD ARCHIVE EPA Z-883 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
Collation 253 pages : illustrations (maps) ; 28 cm

Document Number: 317 Full Record
Main Title Nuclear methods in environmental research {proceedings}
Author Vogt, James R. ; Carter, Robert L. ; Parkinson, Thomas F.
Publisher Office of Conferences and Short Courses, Univ. of Missouri,
Year Published 1971
OCLC Number 01723377
Additional Subjects Pollution--Measurement--Congresses ; Radioactivation analysis--Congresses
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EKBM  TD172.5.N83 1971 Research Triangle Park Library/RTP, NC 11/13/2023

Document Number: 318 Full Record
Main Title Nutrient removal from cannery wastes by spray irrigation of grassland /
Other Authors
Author Title of a Work
Thomas, R. E.
Myers, Leon H.
CORP Author Law, James P.
Publisher Federal Water Pollution Control Administration,
Year Published 1969
Report Number EPA 16080-11-69
OCLC Number 15530777
Subjects Sewage irrigation ; Canneries--Waste disposal ; Land treatment of wastewater
Internet Access
Description Access URL
https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=9101XLUQ.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJBD  EPA 16080-11-69 c.1 Headquarters Library/Washington,DC 03/05/2014
ELBD ARCHIVE EPA 16080-11-69 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
ELBD RPS EPA 16080-11-69 repository copy AWBERC Library/Cincinnati,OH 09/29/2015
EMBD  WPCR 16080 11/69 NRMRL/GWERD Library/Ada,OK 06/10/1994
ENAM  TD760.L38 1969 Region 7 Library, Kansas City, KS 02/15/1997
Collation xii, 73 pages ; 28 cm.

Document Number: 319 Full Record
Main Title Nutrient removal from cannery wastes by spray irrigation of grassland /
Author La, James P.
Other Authors
Author Title of a Work
Thomas, R. E.
Myers, Leon H.
CORP Author Law, James P.
Publisher Federal Water Pollution Control Administration,
Year Published 1969
Report Number FWPCA-16080; 04062,; 16080-11/69
Stock Number PB-189 774
Subjects Sewage irrigation ; Canneries--Waste disposal ; Land treatment of wastewater
Additional Subjects ( Water pollution ; Control) ; ( Wastes(Industrial) ; Separation) ; Solids ; Vegetables ; Chemical reactions ; Sprays ; Soils ; Nitrogen compounds ; Phosphorus compounds ; Rainfall ; Grasses ; Hydrology ; Waste water treatment ; Cannery waste water ; Water conservation ; Runoff
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB-189 774 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xii, 73 pages ; 28 cm.

Document Number: 320 Full Record
Main Title Occurrence and characteristics of ground water in the Powder River Basin, Wyoming /
Author Feathers, Kenneth R.
Other Authors
Author Title of a Work
Libra, Robert D.,
Stephenson, Thomas R.
Publisher Water Resources Research Institute, University of Wyoming,
Year Published 1981
Report Number EPA 908-R-81-012 v.I-A; EPA 908-R-81-013 v.I-B
OCLC Number 08001319
Subjects Groundwater--Wyoming
Internet Access
Description Access URL
EPA 908-R-81-012 v.I-A https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=94009E59.PDF
EPA 908-R-81-013 v.I-B https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=94009EBX.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
ELBD ARCHIVE EPA 908-R-81-012 v.I-A, 2 copies AWBERC Library/Cincinnati,OH 05/04/2022
ELBD ARCHIVE EPA 908-R-81-013 v.I-B, 2 copies AWBERC Library/Cincinnati,OH 05/04/2022
Collation 2 volumes : illustrations, maps ; 28 cm

Document Number: 321 Full Record
Main Title Occurrence and Characteristics of Ground Water in the Powder River Basin, Wyoming. Volume 1-A
Author Feathers, Kenneth R. ; Libra, Robert ; Stephenson, Thomas R. ; University of Wyoming
Publisher US EPA Region 8
Year Published 1981
Additional Subjects hydrogeologic basin ; chemical quality ; wyoming ; ground water ; groundwater ; underground injection control program ; UIC
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EOAL  R8 0304 Region 8 Technical Library/Denver,CO 02/16/2001

Document Number: 322 Full Record
Main Title Occurrence and Characteristics of Ground Water in the Powder River Basin, Wyoming. Volume 1-B
Author Feathers, Kenneth R. ; Libra, Robert ; Stephenson, Thomas R. ; University of Wyoming
Publisher US EPA Region 8
Year Published 1981
Additional Subjects hydrogeologic basin ; chemical quality ; ground water ; groundwater ; Wyoming ; Underground Injection Control Program ; UIC
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EOAL  R8 0305 Region 8 Technical Library/Denver,CO 02/16/2001

Document Number: 323 Full Record
Main Title Oil and gas map of Wyoming 1984 /
Author Stephenson, Thomas R.
Other Authors
Author Title of a Work
Ver Ploeg, Alan J.
Chamberlain, Lori S.
Publisher Geological Survey of Wyoming,
Year Published 1984
OCLC Number 11544261
Subjects Petroleum--Wyoming--Maps ; Natural gas--Wyoming--Maps
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EOAM  QE181.S73 no.12 1984 Region 8 Technical Library/Denver,CO 09/07/2010
Collation 1 map : col. ; 94 x 122 cm.

Document Number: 324 Full Record
Main Title On and off the record : Colosi on negotiation /
Author Colosi, Thomas R.
Publisher Kendall/Hunt Pub. Co.,
Year Published 1993
OCLC Number 29485483
ISBN 0840385854
Subjects Negotiation
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EHAM  BF637.N4C57 1993 Region 1 Library/Boston,MA 06/29/2001
EJBM  BF637.N4C57 1993 Headquarters Library/Washington,DC 07/02/2004
Collation xv, 122 p. : ill. ; 23 cm.

Document Number: 325 Full Record
Main Title Opportunities in the nutrition and food sciences : research challenges and the next generation of investigators /
Other Authors
Author Title of a Work
Thomas, Paul R.
Earl, Robert O.
CORP Author Institute of Medicine (U.S.). Committee on Opportunities in the Nutrition and Food Sciences.
Publisher National Academy Press,
Year Published 1994
OCLC Number 29359112
ISBN 0309048842
Subjects Nutrition--Research ; Food--Research ; Nutrition ; Research
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJEM  QP143.I56 1994 OCSPP Chemical Library/Washington,DC 04/23/1999
Collation xviii, 310 p. : ill. ; 23 cm.

PREV 1 ... 8 9 10 11 12 13 14 15 16 17 18 ... 21 NEXT