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Continuous Flotation of Fluorspar Fromm a Calcareous Illinois Ore

William H. EddyJames S. BrowningJames E. Hardemon

出版	Bureau of Mines, U.S. Department of the Interior, 1967
URL	http://books.google.com.hk/books?id=roLePgAACAAJ&hl=&source=gbs_api