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Search Results for the EPA National Library Catalog
Items Found: 900
Showing: Items 601 - 650
Your Search: (SUBJECT=FRESHWATER)
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Year Published
601
Oil in freshwater : chemistry, biology, countermeasure technology : proceedings of the Symposium of Oil Pollution in Freshwater, Edmonton, Alberta, Canada
1987
602
Oligohaline Areas in Tampa Bay Tributaries: Spatial Extent and Species Lists.
1992
603
Oregon, USA, ecological regions and subregions for water quality management /
1991
604
Ovarian Mycosis in the Topsmelt 'Atherinops affinis'.
1991
605
Overview of Case Studies on Recovery of Aquatic Systems from Disturbance.
1990
606
Para-tert-butyl Benzoic Acid: Acute Toxicity (salmo Gairdneri, Daphnia Magna and Selenastrum Capricornutum) and Octanol/water Partition Coef. W/letter.
1986
607
Parasites of freshwater fish. I, Fungi.
1963
608
Parasites of North American freshwater fishes
1999
609
Pathogenic Naegleria : distribution in nature /
1979
610
Pathways of trace elements in Arctic lake ecosystems : progress report to the Atomic Energy Commission for the period 15 April 1970 through 14 April 1971 /
1971
611
Pathways of trace elements in Arctic lake ecosystems;
1970
612
Patterns in freshwater fish ecology /
1998
613
Patuxent River Basin : environmental assessment of stream conditions /
1998
614
Pennak's freshwater invertebrates of the United States : Porifera to Crustacea /
2001
615
Pentabromodiphenyl Oxide (PeBDPO): A 96-Hour Flow-Through Acute Toxicity Test with the Rainbow Trout (Oncorhynchus Mykiss), with Cover Letter dated 10/29/1997.
1997
616
Periphyton communities in streams of the Ozark plateaus and their relations to selected environmental factors
2003
617
Periphyton of freshwater ecosystems : proceedings of the First International Workshop on Periphyton of Freshwater Ecosystems, held in V axj o, Sweden, 14-17 September 1982 /
1983
618
Perspectives on nonpoint source pollution : proceedings of a national conference, Kansas City, Missouri, May 19-22, 1985.
1985
619
Pesticides and freshwater fauna,
1971
620
Peterson field guide to freshwater fishes of North America north of Mexico /
2011
621
Pharmacological testing of blue-green algae for constituents having therapeutic value /
1970
622
Phosphorus cycling in a periphyton-dominated freshwater wetland /
1997
623
Phosphorus in freshwater ecosystems proceedings of a symposium held in Uppsala, Sweden, 25-28 Sept. 1985 /
1988
624
Photosynthetic pigments of Lake Superior periphyton and their relation to primary productivity,
1970
625
Phycoperiphyton responses to the discharge of fish hatchery effluents in two eastern Sierra Nevada streams
1976
626
Physical, chemical and bacteriological water quality in Gunpowder Falls and Little Gunpowder Falls : 1965 summer survey/
1967
627
Physical, chemical, and biological data for selected streams in Chester County, Pennsylvania, 1969-80
1989
628
Physicochemical Factors Affecting Toxicity in Freshwater: Hardness, pH, and Temperature (Chapter 1).
1994
629
Phytoplankton and trophic gradients : proceedings of the 10th workshop of the International Association of Phytoplankton Taxonomy & Ecology (IAP), held in Granada, Spain, 21-29 June 1996 /
1998
630
Phytoplankton and zooplankton composition, abundance and distribution : Lake Erie, Lake Huron, and Lake Michigan - 1983 /
1987
631
Phytoplankton and zooplankton composition, abundance and distribution and trophic interactions : offshore region of Lakes [i.e. Lake] Erie, Lake Huron and Lake Michigan : 1985 /
1989
632
Phytoplankton and zooplankton in Lakes Erie, Lake Huron and Lake Michigan, 1984 /
1988
633
Phytoplankton dynamics in the North American Great Lakes /
1996
634
Phytoplankton growth and chlorophyll levels in the Sacramento-San Joaquin delta through San Pablo Bay /
1977
635
Phytoplankton productivity : carbon assimilation in marine and freshwater ecosystems /
2002
636
Phytoplankton succession from 1968 to 1990 in the subarctic Lokka reservoir = Yhteenveto : Kasviplanktonin kehitys vuosina 1968-1990 subarktisessa Lokan tekoaltaassa /
1995
637
Phytoplankton water quality relationships in U.S. lakes /
1979
638
Pilot study for Montgomery County and Maryland DNR data integration : comparison of benthic macroinvertebrate sampling protocols for freshwater streams /
2003
639
Pilot study to evaluate biological, physical, chemical, and land-use characteristics in Maryland coastal plain streams
1993
640
Pilot study to evaluate biological, physical, chemical, and land-use characteristics in Maryland coastal plain streams : year 2 /
1995
641
Plankton analysis : training manual /
1975
642
Plankton analysis : training manual.
1970
643
Plankton community and hydraulic characterization preliminary to lake flushing /
1969
644
Plankton micro-fossils as indicators of paleotrophic dynamism in Flathead Lake : completion report, project no. A-074-MONT /
1975
645
Planned and actual impacts on fish and water quality on {i.e. in} three national forests in northern Idaho
1987
646
Pollution ecology of freshwater invertebrates.
1974
647
Pond littoral ecosystems : structure and functioning : methods and results of quantitative ecosystem research in the Czechoslovakian IBP wetland project /
1978
648
Population, water & wildlife : finding a balance /
2002
649
Potential for Transfer of Polynuclear Aromatic Hydrocarbons from Contaminated Fish (progress Report) with Cover Letter dated 021286 & Epa Acknowlegement Letter.
1986
650
Pre-impoundment study of the North Anna River, Virginia
1972
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