http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Geology and underground waters of the Arkansas Valley in eastern Colorado
1 online resource (90 pages) : illustrations, maps + 2 plates.
Includes bibliographical references and index.
Professional paper (Geological Survey (U.S.)) ; no. 52