http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 online resource (xxxiv, 545 pages :) : illustrations, maps
compiled and written by the Federal Writers' Project of the Works Progress Administration ; with an introduction by Robert S. McElvaine.
Originally published: New York : Viking Press, 1938.
Includes bibliographical references and index.