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Reports of the Inspectors of Mines of the Anthracite and Bituminous Coal Regions of Pennsylvania, for the Year ...
Pennsylvania. Inspectors of Mines
出版
Edwin K. Meyers, state printer
, 1891
URL
http://books.google.com.hk/books?id=nkJLAQAAMAAJ&hl=&source=gbs_api
EBook
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