http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Preliminary metallogenic map of North America
North American Metallogenic Map Committee
1 online resource (iv, 138 pages) : illustrations.
by Michael P. Lee, Philip W. Guild, and Paul G. Schruben.
Includes bibliographical references (pages 127-129).