Search Results for the EPA National Library Catalog

Items Found: 388
Showing: Items 301 - 350
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Overview of Selected Freshwater Aquatic Toxicology Research in the U.S. EPA (Environmental Protection Agency). 1985
Phenol : ambient water quality criteria. 1978
Phthalate esters : ambient water quality criteria. 1978
Phytoplankton water quality relationships in U.S. lakes / 1979
Pigment Indices and Environmental Oxygen Stress. 1968
Plankton Associations and Related Factors in a Hipereutrophic Lake. 1971
Plant Available Phosphorus Status of Lakes. 1971
Polychlorinated biphenyls : ambient water quality criteria.. 1978
Polynuclear aromatic hydrocarbons : ambient water quality criteria. 1979
Potential for Transduction of Plasmids in a Natural Freshwater Environment: Effect of Plasmid Donor Concentration and a Natural Microbial Community on Transduction in 'Pseudomonas aeruginosa'. 1987
Predicting Single-Species Toxicity in Natural Water Systems. 1985
Preliminary Ecological Study of Areas to be Impounded in the Salt River Basin of Kentucky. 1971
Proceedings of the fifth symposium - Pacific Northwest on siltation - its sources and effects on the aquatic environment / 1959
Proceedings of the first and second USA-USSR symposia on the effects of pollutants upon aquatic ecosystems. 1978
Proceedings of the third USA-USSR Symposium on the effects of pollutants upon aquatic ecosystems : theoretical aspects of aquatic toxicology, July 2-6, 1979, Borok, Jaroslav Oblast, USSR / 1980
Proceedings Workshop on Toxic Metals in Water. 1971
Production cycles in aquatic microcosms / 1977
Production of Extracellular Nucleic Acids by Genetically Altered Bacteria in Aquatic-Environment Microcosms. 1989
Project HYPO. An Intensive Study of the Lake Erie Central Basin Hypolimnion and Related Surface Water Phenomena. 1972
Proposed Criteria for Water Quality. Volume I. 1973
Proposed Water Quality Guidance for the Great Lakes System. 1993
Radiation Protection Guides and Dose Assessment. 1964
Report on Bear Lake, Rich County, Utah, and Bear lake County, Idaho : EPA Region X / 1977
Report on Boysen Reservoir, Fremont County, Wyoming : EPA Region VIII / [U.S. Environmental Protection Agency, National Eutrophication Survey] / 1977
Report on Grand Lake, Chicot County, Arkansas : EPA Region VI / 1977
Report on Greer's Ferry Reservoir, Van Buren and Cleburne Counties, Arkansas : EPA Region VI / 1977
Report on Hells Canyon Reservoir, Baker and Wallowa Counties, Oregon [and] Adams and Idaho Counties, Idaho : EPA Region X / 1978
Report on Johnson Reservoir, Dawson and Gosper Counties, Nebraska : EPA Region VII / 1976
Report on Lake Bastrop, Bastrop County, Texas : EPA Region VI / 1977
Report on Lake Effie, Polk County, Florida : EPA Region IV / 1977
Report on Lake Meredith, Hutchinson, Moore, and Potter Counties, Texas. 1977
Report on Lakes Ouachita, Hamilton, and Catherine, Montgomery, Garland, and Hot Springs Counties, Arkansas : EPA Region VI / 1977
Report on Nimrod Lake, Perry and Yell Counties, Arkansas : EPA Region VI / 1977
Report on Ocean Lake, Fremont County, Wyoming : EPA Region VIII / 1977
Report on Payette Lake, Valley County, Idaho : EPA Region X / 1977
Report on Sherman Reservoir, Sherman County, Nebraska : EPA Region VII / 1976
Report on Viva Naughton Reservoir, Lincoln County, Wyoming : EPA Region VIII / [U.S. Environmental Protection Agency, National Eutrophication Survey] / 1977
Review of Methods for the Analysis of Chlorophyll in Periphyton and Plankton of Marine and Freshwater Systems. 1986
Revised Estimates of Power Plant Entrainment of Ichthyoplankton in Western Lake Erie in 1975-77. 1987
Rock Creek Lake, Jasper County, Iowa. 1976
Russian-English glossary of hydrobiology / 1958
Science Advisory Board Review of the Water Quality Criteria Document for Dissolved Oxygen. 1986
Seasonal effects on temperature preference in yellow perch, Perca flavescens / 1977
Second Annotated bibliography on biological effects on [i.e. of] metals in aquatic environments (no. 568-1292) / 1975
Short-term methods for estimating the chronic toxicity of effluents and receiving waters to freshwater organisms / 1989
Short-term methods for estimating the chronic toxicity of effluents and receiving waters to freshwater organisms / 1994
Short-term methods for estimating the chronic toxicity of effluents and receiving waters to freshwater organisms / 1985
Short-term methods for estimating the chronic toxicity of effluents and receiving waters to freshwater organisms. Supplement / 1989
Sorption and Toxicity of Azo and Triphenylmethane Dyes to Aquatic Microbial Populations. 1985
Species of Genus Melosira AG. of Amur River Plankton (O Vidakh roda Melosira ag. Planktona reki Amur). 1974
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