http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Appraisal of the water resources of the Big Sioux aquifer, Lincoln and Union counties, South Dakota
1 online resource (iv, 37 pages) : illustrations, maps.
by Colin A. Niehus and Ryan F. Thompson ; prepared in cooperation with the South Dakota Geological Survey, and Lincoln and Union counties.
Includes bibliographical references (pages 36-37).
Water-resources investigations report ; 97-4161