http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Coal-bearing Upper Pennsylvanian and Lower Permian rocks, Washington area, Pennsylvania
Bureau of Topographic and Geologic Survey.
1 online resource (iv, 47 pages) : illustrations, maps + 2 tables and 8 plates.
pt. 1. Lithofacies. -- pt. 2. Economic and engineering geology.
by Henry L. Berryhill, Jr., Stanley P. Schweinfurth, and Bion H. Kent.
Title from title screen (viewed September 24, 2014).
"Work done in cooperation with the Pennsylvania Bureau of Topographic and Geologic Survey."
Includes bibliographical references (pages 43-44) and index.
Berryhill, Henry L., Jr. (Henry Lee), 1921-2013.
Geological Survey professional paper ; 621