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Contributions to Economic Geology (short Papers and Preliminary Reports) 1926. Part II. -- Mineral Fuels. W.T. Thom, Jr., Geologist in Charge. [U.S. Geological Survey Bulletins No. 786, 786-A, and 786-B.].

United States. Congress. House

出版	U.S. Government Printing Office, 1926
URL	http://books.google.com.hk/books?id=83yGzQEACAAJ&hl=&source=gbs_api