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V (Stack)Hoffman, John N.
Anthracite in the Lehigh Region of Pennsylvania, 1820-45
United States National Museum Bulletin 252; Contributions from The Museum of History and Technology: Paper 72 [pp. 89-141]. Washington, D.C.: Smithsonian Institution Press, 1968. Transferred to Bodleian, September 2017.
[1968-442]
1968