Surface water quality, Twin Ponies watershed, Pottawattamie and Mills Counties, Iowa /

by Detroy, Mark G.
Published 1981

Hydrology of area 38, western region, interior coal province Iowa and Missouri /

by Detroy, Mark G.
Published 1983

Ground-water-quality-monitoring program in Iowa : nitrate and pesticides in shallow aquifers /

by Detroy, Mark G.
Published 1988

Iowa ground-water-quality monitoring program /

by Detroy, Mark G.
Published 1985

Occurrence and distribution of nitrate and herbicides in the Iowa River alluvial aquifer, Iowa--May 1984 to November 1985 /

by Detroy, Mark G.
Published 1988

Water quality of alluvial aquifers, Carroll and Guthrie counties, Iowa, with emphasis on the occurrence of nitrate and pesticides, 1986-87 /

by Detroy, Mark G.
Published 1990

Occurrence and distribution of nitrate and herbicides in the Iowa River alluvial aquifer, Iowa--May 1984 to November 1985 /

by Detroy, Mark G., Kuzniar, Ronald L.
Published 1988

Ground-water-quality-monitoring program in Iowa : nitrate and pesticides in shallow aquifers /

by Detroy, Mark G., Hunt, Pamela K. B., Holub, Maureen A.
Published 1988

Water quality of Indian Creek-Van Buren watershed, Iowa and Missouri /

by Slack, Larry J.
Published 1980

Water quality of alluvial aquifers, Carroll and Guthrie counties, Iowa, with emphasis on the occurrence of nitrate and pesticides, 1986-87 /

Published 1990