http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
ix, 101 pages, 6 unnumbered folded leaves of plates : illustrations ; 24 cm.
by Frederick K. Mack. Prepared in cooperation with the Geological Survey, U.S. Dept. of the Interior and the Washington Suburban Sanitary Commission.
Part of illustrative material fold. in pocket.
Bulletin (Maryland Geological Survey) ; 29