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Google圖書搜尋
Washability Study of Coal from Mary Lee Bed, Maben, Ala
H. L. Riley
R. E. Perry
John B. Gayle
出版
United States Department of the Interior, Bureau of Mines
, 1958
URL
http://books.google.com.hk/books?id=snhYzgEACAAJ&hl=&source=gbs_api