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Investigation of Anson Betts Manganese Mine, Hampshire County, Mass

McHenry MosierM. L. Thomas

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