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The Role of Stratification in the Separation of Coal and Refuse on a Coal-washing Table

A. J. KraemerByron Matthew BirdJohn GrossS. R. ZimmerleyH. S. DavisPeter GrandoneAlan ProbertC. S. Luce

出版	U.S. Department of Commerce, Bureau of Mines, 1929
URL	http://books.google.com.hk/books?id=FdAdRB9ZqHwC&hl=&source=gbs_api