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Google圖書搜尋
Underground Transportation of Coal
Albert L. Toenges
Frank A. Jones
Edward Thomas (Mining engineer)
其他書名
Progress report 2
出版
U.S. Department of the Interior, Bureau of Mines
, 1941
URL
http://books.google.com.hk/books?id=Lrck-k27eewC&hl=&source=gbs_api
EBook
FULL_PUBLIC_DOMAIN