http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 online resource (viii, 722 pages) : illustrations.
Donald A. Brobst and Walden P. Pratt, editors.
"First printing 1973, Second printing 1973, Third printing 1981."
G.P.O. sales statement incorrect in publication.
Includes bibliographical references and index.
Geological Survey professional paper ; 820