http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Water-quality characteristics of six small, semiarid watersheds in the Green River coal region of Colorado
1 online resource (iv, 96 pages) : illustrations, maps.
"Prepared in cooperation with the U.S. Bureau of Land Management."
Includes bibliographical references (page 26).