Search Results for the EPA National Library Catalog

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Select Item Title Year Published
Trends in phosphorus, nitrogen, Secchi depth, and dissolved oxygen in Chesapeake Bay, 1984 to 1992. 1994
Water balance and quantification of total phosphorus and total nitrogen loads entering and leaving the Lago de Cidra, central Puerto Rico 1997
Water nutrients. No. 2, study number 36, Report of a study conducted by Analytical Reference Service / 1970
Well data, surface-water discharges, and nitrate concentrations, February 1986 - September 1987, in parts of the Pasco Basin, Washington / by B.W. Drost ... {et al.} ; prepared in cooperation with the State of Washington Department of Ecology. 1989
Willamette Basin, Oregon : nitrogen in streams and ground water, 1980-90 / 1996
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