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Concentration of Oxide Manganese Ores from the Vicinity of Long Valley, Coconino County, Ariz
Carl H. SchackH. G. PooleA. O. Ipsen
出版U.S. Department of the Interior, Bureau of Mines, 1947
URLhttp://books.google.com.hk/books?id=qBkPQsYr1cwC&hl=&source=gbs_api
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