http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Manganese deposits of the Elkton area, Virginia
Strategic mineral investigations, 1943, manganese deposits, Elkton area, Virginia
1 online resource (iv, 15-55 pages, 4-9 pages of plates) : illustrations, maps (some color).
Title from title screen (viewed July 10, 2014).
Bulletin (Geological Survey (U.S.)) ; no. 940-B
Strategic minerals investigations ; 1943