http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 online resource (56 unnumbered pages) : illustrations, maps + 1 plate.
Title from title screen (viewed September 22, 2014).
Includes bibliographical references and index.
Macdonald, Gordon A. (Gordon Andrew), 1911-1978.
Professional paper (Geological Survey (U.S.)) ; no. 214-D