Ground-water vulnerability to nitrate contamination at multiple thresholds in the Mid-Atlantic Region using spatial probability models [electronic resource] / by Earl A. Greene, Andrew E. LaMotte, and Kerri-Ann Cullinan ; in cooperation with the U.S. Environmental Protection Agency, Regional Vulnerability Assessment (ReVA) Program.
Imprint
Reston, Va. : U.S. Dept. of the Interior, U.S. Geological Survey, 2005.
Mode of access: Internet from the USGS web site. Address as of 10/2/08: http://pubs.usgs.gov/sir/2004/5118/SIR2004-5118.pdf; current access available via PURL.