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Diamond Drilling Blast Holes, Balmat Mine, St. Lawrence County, N.Y.

McHenry Mosier

出版	U.S. Department of the Interior, Bureau of Mines, 1947
URL	http://books.google.com.hk/books?id=9gKKH1y-M28C&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN