A Review of methods for assessing aquifer sensitivity and ground water vulnerability to pesticide contamination.
Washington, DC : U.S. Environmental Protection Agency, 
Groundwater > Groundwater / Pollution.
"This document was prepared for the U.S. Environmental Protection Agency, Office of Ground Water and Drinking Water, Ground Water Protection Division under Contract No. 68-CO-0083"--P. iii.
1 v. (various pagings) :
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