1. Farming, Fertilizers and the Nitrate Problem;Addiscott,1992
2. Seasonal correlation of well contamination and septic tank distance;Arnade;Ground Water,1999
3. Nitrate and selected pesticides in ground water of the Mid-Atlantic Region;Ator;US Geological Survey. Water-Resources Investigation Report 97-4139,1997
4. Hydrogeologic Framework, Ground-water, Geochemistry, and Assessment of N Yield from Base Flow in Two Agricultural Watersheds, Kent County, Maryland;Bachman,2002
5. Summary Characterization for Water Resource Inventory Area #1;Blake,2001