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Washability Studies of Coal from the Henry Ellen Bed at Acmar No. 5 Mine, Acmar, Ala
Bennie William Gandrud
United States. Bureau of Mines
Glen Dale Coe
出版
U.S. Department of the Interior, Bureau of MInes
, 1936
URL
http://books.google.com.hk/books?id=P4I4jwEACAAJ&hl=&source=gbs_api