Search Results for the EPA National Library Catalog

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Showing: Items 801 - 850
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Select Item Title Year Published
Nutrients in natural waters, 1972
Nutrients in the nation's streams and groundwater, 1992-2004 / 2010
Nutritional ecology of nuisance aquatic plants / 1975
Observation on the rate of phosphorus input into Lake George and its relationship to the Lake's trophic state. 1974
Observe the Rule, An Ounce of Prevention When Using the New Insecticides. 1955
Occupational and environmental pesticide exposure study in South Florida / 1975
Occupational Exposure to Pesticides. 1974
Occupational Pesticide Exposure and Renal Tubular Dysfunction. 1967
Occurrence and distribution of potentially volatile trace elements in coal / 1974
On-farm improvements to reduce sediment and nutrients in irrigation return flow / 1984
On-Line Colorimetric Analyzers for Monitoring Nitrate-Nitrite, Ammonia, Orthophosphorus and Total Hydrolyzable Phosphorus in Wastewater-Treatment Process Streams. 1974
One-generation Reproduction Study in Rats with Elemental Phosphorus Conducted by Gavage in Rats (Ppathology Report) with Cover Letter Dated 02/05/1991. 1991
Open Lake Water Quality Conditions for Lake Erie's Central and Eastern Basins, 1985. 1987
Open Lake Water Quality Conditions for Lake Erie's Western, Central and Eastern Basins, 1986. 1988
Optimal Cost Control Strategies for Attached Algae. 1983
Optimization of nitrogen removal by rapid infiltration / 1985
Optimizing phosphorus control strategies for the Great Lakes Basin a linear programming approach / 1980
Optimum N:P Ratios and Coexistence of Planktonic Algae (Journal Version). 1980
Organic compounds in organophosporus pesticide manufacturing wastewaters / 1978
Organic Loading Study of Full-Scale Sequencing Batch Reactors. 1985
Organic Phosphorus Poisoning and Its Therapy, with Special Reference to Modes of Action and Compounds that Reactivate Inhibited Cholinesterase. 1961
Organophosphate and Organophosphorothionate Esters: Application of Linear Free Energy Relationships to Estimate Hydrolysis Rate Constants for Use in Environmental Fate Assessment. 1980
Organophosphate Pesticides: The Residue Intoxication Problem. 1974
Organophosphorus Insecticides and Mental Alertness, Studies in Exposed Workers and in Poisoning Cases. 1964
Organophosphorus Pesticide Poisonings in Humans: Determination of Residues and Metabolites in Tissues and Urine. 1977
Organophosphorus poisons : anticholinesterases and related compounds / 1961
Overland flow treatment of raw wastewater with enhanced phosphorus removal / 1976
Overview and Evaluation of Section 108-A Great Lakes Demonstration Programs. 1986
Overview of Rural Nonpoint Pollution in the Lake Erie Basin. 1987
Paralytic and Related Effects of Certain Organic Phosphorus Compounds. 1955
Parathion Toxicity in Perinatal Rats Born to Spontaneously Hypertensive Dams. 1978
Parathion Toxicity in Perinatal Rats Exposed in Utero. 1979
Patterns and processes of variation in nitrogen and phosphorus concentrations in forested streams 2001
Percentile distributions of median nitrite plus nitrate as nitrogen, total nitrogen, and total phosphorus concentrations in Oklahoma streams, 1973-2001 2003
Performance evaluation of an existing seven cell lagoon system / 1977
Performance evaluation of existing aerated lagoon system at Consolidated Koshkonong Sanitary District, Edgerton, Wisconsin / 1979
Persistence of Methyl and Ethyl Parathion Following Spillage on Concrete Surfaces. 1977
Persistence of Parathion in Soil. 1973
Persistence of Parathion in Soil. 1973
Personal Computers and Environmental Engineering. Part 2. Applications. 1987
Perspectives on Chesapeake Bay, 1994: Advances in Estuarine Sciences. 1994
Pesticide Assessment Guidelines, Subdivision F, Hazard Evaluation: Humans and Domestic Animals. Acute Delayed Neurotoxicity of Organophosphorous Substances and Subchronic Delayed Neurotoxicity (90-Day Study). Addendum 5 on Data Reporting. 1988
Pesticide fact sheet : ethephon. 1988
Pesticide fact sheet name of chemical, phorate : reason for issuance, registration standard. 1988
Pesticide Fact Sheet No. 222: Fenamiphos. 1987
Pesticide fact sheet number 184 : Tetrachlorvinphos. 1988
Pesticide induced delayed neurotoxicity : proceedings of a conference / 1976
Pesticide induced delayed neurotoxicity : proceedings of a conference, February 19-20, 1976, Washington, D. C. / 1976
Pesticide Residue Analysis in Water (103.1) Training Manual. 1974
Pesticide Residue Levels in Soils and Crops, FY-70--National Soils Monitoring Program (II). 1974
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