1. Occurrence and distribution of nitrate and herbicides in the Iowa River alluvial aquifer, Iowa--May 1984 to November 1985 Author/Creator: Detroy, Mark G., author Publication/Creation: Iowa City, Iowa : U.S. Geological Survey, 1988 Resource Type: Book Access & Availability: Loading
2. Overview of susceptibility of aquifers to contamination, Union County, Arkansas Author/Creator: Leidy, Valarie A., author Publication/Creation: Little Rock, Arkansas : U.S. Geological Survey, 1992 Resource Type: Book Access & Availability: Loading