Search Results for the EPA National Library Catalog

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Harmful algae 2002 : proceedings of the Xth International Conference on Harmful Algae, St. Pete Beach, Florida, USA, October 21-25, 2002 / 2004
Harmful algae = Algas nocivas : proceedings of the VIII International Conference on Harmful Algae, Vigo Spain, 25-29 June 1997 / 1998
Health effects criteria for fresh recreational waters / 1984
Heterotrophic Bacteria of the Freshwater Neuston and Their Ability to Act as Plasmid Recipients under Nutrient Deprived Conditions. 1991
Hexabromocyclododecane (HBCD): A 96-Hour Flow-Through Acute Toxicity Test with the Rainbow Trout (Oncorhynchus Mykiss), with Cover Letter dated 06/27/1997. Final Report. 1997
Historical changes in large river fish assemblages of the Americas 2005
Historical overview of the freshwater inflow and sewage treatment plant discharges to the Potomac River estuary with resultant nutrient and water quality trends 1981
How to know the aquatic plants 1969
How to know the aquatic plants / 1973
How to know the aquatic plants / 1980
How to know the fresh-water algae; an illustrated key for identifying the more common fresh-water algae to genus, with hundreds of species named and pictured and with numerous aids for their study 1964
How to know the fresh-water algae; an illustrated key for identifying the more common fresh-water algae to genus, with hundreds of species named pictured and with numerous aids for their study. 1954
How to know the freshwater algae / 1978
How to know the freshwater Crustacea 1983
How to know the freshwater fishes / 1978
How to know the freshwater fishes : pictured-keys for identifying all of the freshwater fishes of the United States, and also including a number of marine species which often enter freshwater / 1957
Hydrobiological studies on some Danish ponds and lakes. Part II: The quotient hypothesis and some new or little known phytoplankton organisms. 1949
Identification of freshwater diatoms from live material 1996
Illustrated guide to aquatic macroinvertebrates 2000
Illustrations of Fresh Water Algae Toxic to Animals. 1952
Impact of Freshwater Flow Variations in the Manatee River. 1994
Impact of urbanization on the hydrology of Pocono Creek Watershed a model study / [electronic resource] : 2006
Impacts of coalmine discharges on Illinois Unionid mussels / 2004
Imperiled waters, impoverished future : the decline of freshwater ecosystems / 1996
Impervious surface area and benthic macroinvertebrate response as an index of impact from urbanization on freshwater wetlands / 1995
Impervious Surface Area and Benthic Macroinvertebrate Response as an Index of Impact from Urbanization on Freshwater Wetlands. 1995
Impervious surface area and benthic macroinvertebrate response as an indicator of impact from urbanization of freshwater wetlands / 1995
Improving water quality by removal of pesticide pollutants with aquatic plants 1973
In Vitro Evaluation of HFC-125 for Chromosome Aberrations in Human Lymphocytes, with Cover Letter dated 03/20/1991. (Sanitized). 1991
Indicators for waterborne pathogens / 2004
Induction of Nitric Oxide Synthase in Channel Catfish 'Ictalurus punctatus' by 'Edwardsiella ictaluri'. 1994
Industrial wastes : effects on Trinity River ecology, Fort Worth, Texas / 1972
Influence of hydrologic loading rate on phosphorus retention and ecosystem productivity in created wetlands 1995
Influence of low pH on electrolytes and interrenal histochemistry in brook trout (Salvelinus fontinalis) / 1972
Influences of strip mining on the hydrologic environment of parts of Beaver Creek basin, Kentucky, 1955-66. 1970
Initial Submission: 4-Day Static Aquatic Toxicity Studies with Jaguar C-13 in Rainbow Trout and Bluegills with Cover Letter dated 09/04/1992. 1992
Initial Submission: 96-Hour LC50 to Bluegill Sunfish with Lead, Tetraethyl with Cover Letter dated 10/15/1992. 1992
Initial Submission: Acute Aquatic Effects of 4-Aminophenol with Cover Letter Dated 09/08/1992. 1992
Initial Submission: Acute Aquatic Toxicity Info for Luviquat HM 552 (Copolymer of Vinylimidazolium Chloride and Vinylpyrrolidone in Water) Submitted as a Letter Dated 10/01/1993. 1993
Initial Submission: Acute Toxicity of Santoflex 13 in Fathead Minnows with Cover Letter dated 08/14/1992. 1992
Initial Submission: Acute Toxicity of TCC in Bluegill at 15 degrees Celsius with Cover Letter dated 08/14/1992. 1992
Initial Submission: Acute Toxicity of TCC in Bluegill at Dilution Water with a pH of 8.0 with Cover Letter dated 08/14/1992. 1992
Initial Submission: Acute Toxicity of TCC in Bluegill at Dilution Water with a Total Hardness of 250 MG/L with Cover Letter dated 08/14/1992. 1992
Initial Submission: Acute Toxicity of TCC in Bluegill with Cover Letter dated 08/14/1992. 1992
Initial Submission: Acute Toxicity of TCC to Fathead Minnows with Cover Letter dated 08/14/1992. 1992
Initial Submission: Acute Toxicity Study of ACL 60 in Rainbow Trout and Bluegills with Cover Letter Dated 08/14/1992. 1992
Initial Submission: An Assessment of the Environmental Chemistry and Aquatic Toxicology of Trialkyltin Compounds with Cover Letter dated 09/29/1992. 1992
Initial Submission: Basic Toxicity of 4-Methoxy-1-Naphthol with Cover Letter dated 09/08/1992. 1992
Initial Submission: Basic Toxicity of Chloroacetone with Cover Letter dated 09/01/1992. 1992
Initial Submission: Basic Toxicity of Methanesulfonyl Chloride with Cover Letter dated 08/26/1992. 1992
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