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Cleaning Trials on Subbituminous Coal Containing Bentonitic Clay from Lewis and Thurston Counties, Wash
H. F. YanceyM. R. Geer
出版U.S. Department of the Interior. Bureau of Mines, 1961
URLhttp://books.google.com.hk/books?id=aoCaNO9ygIoC&hl=&source=gbs_api
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