Books by Allegheny National Forest (Pa.). Heritage Resources Program:
Books in the extended shelves:
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Allegheny National Forest (Pa.). Heritage Resources Program: Allegheny oil : the historic petroleum industry on the Allegheny National Forest (USDA Forest Service, Eastern Region, 1996), also by Philip W. Ross, West Virginia University. Institute for the History of Technology and Industrial Archaeology, and United States. Forest Service. Eastern Region (page images at HathiTrust)
Find more by Allegheny National Forest (Pa.). Heritage Resources Program at your library, or elsewhere.