http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
iii, 31 pages : illustrations, maps (some color) ; 29 cm.
by John D. Hendricks ; prepared in cooperation with the Arkansas Geological Commission.
Two maps on two folded sheets in pocket.
U.S. Geological Survey professional paper ; 1474