http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Bureau of Topographic and Geologic Survey.
color map ; 145 x 201 cm. on 2 sheets 149 x 105 cm. folded to 28 x 21 cm.
Compiled and edited by Carlyle Gray [and others] A. E. Van Olden, draftsman.
"Base compiled from Army Map Service 1:250,000 scale map sheets."
Includes 4 col. cross sections and "Source of date index map."