http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Mineral resources of the Flat Tops primitive area, Colorado
30 pages : illustrations, maps (2 folded in pocket) ; 24 cm.
Includes bibliographical references (pages 29-30).
U.S. Geological Survey digital data series ; 1230-C