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Google圖書搜尋
The Relation of Geology to Mine Roof Conditions in the Pocahontas No. 3 Coalbed
Noel N. Moebs
John C. Ferm
出版
U.S. Department of the Interior, Bureau of Mines
, 1982
URL
http://books.google.com.hk/books?id=WeIwlXb66HMC&hl=&source=gbs_api
EBook
FULL_PUBLIC_DOMAIN
