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Google圖書搜尋
The Pittsburgh No. 8 and Redstone No. 8A Coal Beds in Ohio
James L. Verber
James Osborn Fuller
Richard M. DeLong
出版
State of Ohio, Department of Natural Resources, Division of Geological Survey
, 1955
URL
http://books.google.com.hk/books?id=NNFRAQAAMAAJ&hl=&source=gbs_api
