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Google圖書搜尋
Preparation Characteristics of Coal from Butler County, Pennsylvania
T. E. Gray
Eugene Robert Palowitch
出版
U.S. Department of the Interior, Bureau of Mines
, 1960
URL
http://books.google.com.hk/books?id=g0JSqpEJRVgC&hl=&source=gbs_api
EBook
FULL_PUBLIC_DOMAIN
