1. Water quality of alluvial aquifers, Carroll and Guthrie counties, Iowa, with emphasis on the occurrence of nitrate and pesticides, 1986-87 Author/Creator: Detroy, Mark G., author Publication/Creation: Iowa City, Iowa : U.S. Geological Survey, 1990 Resource Type: Book Access & Availability: Loading
2. Water quality of alluvial aquifers, Carroll and Guthrie counties, Iowa, with emphasis on the occurrence of nitrate and pesticides, 1986-87 Author/Creator: Detroy, Mark G., author Publication/Creation: Iowa City, Iowa : U.S. Geological Survey, 1990 Resource Type: Book Access & Availability: Loading
3. 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
4. Ground-water-quality-monitoring program in Iowa : nitrate and pesticides in shallow aquifers Author/Creator: Detroy, Mark G., author Publication/Creation: Iowa City, Iowa : Department of the Interior, U.S. Geological Survey, 1988 Resource Type: Book Access & Availability: Loading