http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Surficial materials in the conterminous United States
1 online resource (1 map) : color + pamphlet (11 pages).
David R. Soller and Marith C. Reheis, compilers.
Includes bibliographical references in pamphlet (pages 8-11).
U.S. Geological Survey open-file report ; 2003-275