Search Results for the EPA National Library Catalog

Items Found: 968
Showing: Items 701 - 750
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Select Item Title Year Published
NCAR CSM Sea Ice Model. 1996
Nematode Community Structure. A Tool for Evaluating Water Resource Environments. 1972
New Species of Leech, 'Batracobdella cryptobranchii' n. sp. (Annelida: Hirudinea), Parasitic on the Ozark Hellbender. 1977
Niche Relationships and Population Ecology of Rainbow (Etheostoma caeruleum) and Fantail (E. flabellare) Darters in a Temporally Variable Environment. 1984
Nickel : ambient water quality criteria / 1978
Nile : biology of an ancient river 1976
Nitrobenzene : ambient water quality criteria. 1978
Nitrophenols : ambient water quality criteria. 1978
North Platte River Biological Survey Report October-November 1963. 1963
North Waubay Lake, Day County, South Dakota. 1976
Northern fishes : with special reference to the Upper Mississippi Valley / 1974
Numerical and graphical procedures for estimation of community photosynthesis and respiration in experimental streams {microform} / 1982
Nutrient dynamics and gas production in aquatic ecosystems : the effects and utilization of mercury and nitrogen in sediment-water microcosms 1975
Nutrient-Algal Relationships in Lake Lillinonah, Danbury, Connecticut, June-September, 1975. 1975
Occurrence of 'Esox niger' in Santa Rosa Sound, Florida. 1977
Optimum Temperature for Growth of Juvenile Bluegills. 1977
Osmoregulatory Failure and Death of First-Year Largemouth Bass 'Micropterus salmoides' Exposed to Low pH and Elevated Aluminum, at Low Temperatures in Soft Water. 1992
Overview of Atmospheric Inputs and Losses from Films. 1982
Overview of Selected Freshwater Aquatic Toxicology Research in the U.S. EPA (Environmental Protection Agency). 1985
Pathogenic Naegleria : distribution in nature / 1979
Performance of an Aquatic Multispecies System in Evaluating the Effects of a Model Microbial Pest Control Agent on Nontarget Organisms. 1992
Perspectives on temperature in the Pacific Northwest's fresh waters 1999
Pesticide Levels in Water and Wildlife of Reelfoot Lake, Tennessee. 1973
Pesticide testing with littoral enclosures / 1990
Pesticides and freshwater fauna, 1971
Phenol : ambient water quality criteria. 1978
Photochemical Fate of Agrochemicals in Natural Waters. 1991
Phthalate esters : ambient water quality criteria. 1978
Phytoplankton water quality relationships in U.S. lakes / 1979
Pigment Indices and Environmental Oxygen Stress. 1968
Pike Perch Breeding in the Ponds and Small Reservoirs of Moldavia (O Razvedenii Sudaka v Prudakh i Malykh Vodokhranilishchakh Moldavii). 1962
Plankton Associations and Related Factors in a Hipereutrophic Lake. 1971
Plant Available Phosphorus Status of Lakes. 1971
Pollution-Caused Fish Kills in 1960. 1960
Pollution-Caused Fish Kills in 1964. 1964
Polychlorinated biphenyls : ambient water quality criteria.. 1978
Polynuclear aromatic hydrocarbons : ambient water quality criteria. 1979
Potential Climate-Induced Runoff Changes and Associated Uncertainty in Four Pacific Northwest Estuaries. 2012
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
Potential productivity of fresh water environments as determined by an algal bioassay technique 1970
Predicting and Evaluating the Effects of Acidic Precipitation on Water Chemistry and Endemic Fish Populations in the Northeastern United States. 1986
Predicting Single-Species Toxicity in Natural Water Systems. 1985
Prediction of Chemical Accumulation by Fish. 1982
Preliminary Ecological Study of Areas to be Impounded in the Salt River Basin of Kentucky. 1971
Preliminary Results from Three Ecotoxicity Studies Conducted on Triphenylbenzyl Phosphonium Cation/N-Methyl Perfluorooctanesulfonamide Salt (TPBP C8 Amide). 2003
Presence of Enteric Viruses in Freshwater and Their Removal by the Conventional Drinking Water Treatment Process. 1991
Probabilistic ecological risk assessment of tributyltin in the Chesapeake Bay watershed : final report / 1998
Probability-of-Use Criteria for the Family Salmonidae. 1978
Procedures for the derivation of equilibrium partitioning sediment benchmarks (ESBs) for the protection of benthic organisms : Endrin / 2003
Proceedings of the fifth symposium - Pacific Northwest on siltation - its sources and effects on the aquatic environment / 1959
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