<<The>> economic Importance of the coal industry to Pennsylvania an investigation conducted under the auspices of the Coal Research Board of the Commonwealth of Pennsylvania

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Bibliographic Details
Main Author: Schenck, George Henry Koewing (Author)
Other Authors: Schanz, John J. (Author)
Format: UnknownFormat
Published: University Park, Pa. 1967
Series:Special Research Report / Department of Mineral Ecoomics. College of Earth and Mineral Sciences. Pennsylvania State University 64
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Description
Physical Description:IX, 289 S. ; 4-o