References
- American Public Health Association . 1980 . Standard methods for the examination of water and wastewater. , 15th edition New York, NY
- U. S. Environmental Protection Agency . 1979 . Methods for chemical analysis of water and wastes , Cincinnati, OH : EPA Environmental Monitoring and Support Laboratory . EPA‐600/4–79–020
- U. S. Environmental Protection Agency . 1975a . Report on Noxontown Pond, New Castle County, Delaware , Working Paper No. 239 Corvallis, OR : National Eutrophication Survey, EPA .
- U. S. Environmental Protection Agency . 1975b . Report on Silver Lake, New Castle County, Delaware , Working Paper No. 240 Corvallis, OR : National Eutrophication Survey, EPA .
- Brinsfield , R. B. , Staver , R. K. and Magette , W. 1987 . The role of cover crops in reducing nitrate leaching to ground water . Proceedings of Conference on Agricultural Impacts on Ground Water . March 21–23 1987 , Des Moines, IA. 1988
- Published as Miscellaneous Paper No. 1272 of the Delaware Agricultural Experiment Station.