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1
Symposium abstracts and reference papers: I.C. White Memorial Symposium--The Age of the Dunkard, September 25-29, 1972.
by Barlow, James A.
Morgantown, West Virginia Geological Survey 1972

Conference Proceeding Book
2
Coal-bearing Upper Pennsylvanian and Lower Permian rocks, Washington area, Pennsylvania,
by Berryhill, Henry L. (Henry Lee), 1921-
Washington, U.S. Govt. Print. Off., 1971

Book
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