http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
retrospective analysis on the occurrence of arsenic in ground-water resources of the United States and limitations in drinking-water-supply characterizations
Office of Ground Water and Drinking Water.
1 online resource (v, 22 pages) : illustrations, maps (some color).
by Michael J. Focazio [and four others] ; prepared in cooperation with the U.S. Environmental Protection Agency, Office of Ground Water and Drinking Water.
Includes bibliographical references (pages 20-21).
Water-resources investigations report ; 99-4279