http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Water quality of alluvial aquifers, Carroll and Guthrie counties, Iowa, with emphasis on the occurrence of nitrate and pesticides, 1986-87
viii, 52 pages : illustrations, maps ; 28 cm.
by Mark G. Detroy [and others] ; prepared in cooperation with the Carroll County Health Department [and others].
Includes bibliographical references (page 37).
Water-resources investigations report ; 89-4186