http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Constitution diagrams of Pennsylvania anthracite
1 online resource (iii, 18 pages, 7 pages of plates) : illustrations.
Title from title screen (viewed July 21, 2014).
Wagner, Holly C. (Holly Clyde), 1918-2005.
Contributions to economic geology ; 1953-54