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Investigation of the Alfred Davis Soapstone Deposits, Gillespie County, Tex

W. D. McMillan

出版	U.S. Department of the Interior, Bureau of Mines, 1949
URL	http://books.google.com.hk/books?id=9EZty7-OtJYC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN