http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
computerized data-base system for land-use and land-cover data collected at ground-water sampling sites in the pilot National Water-Quality Assessment Program
1 online resource (vi, 139 pages) : illustrations.
Includes bibliographical references (page 71).
Water-resources investigations report ; 89-4172