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Studies of Roof Movement in Coal Mines
Earl R. MaizeEdward ThomasHarold Putnam Greenwald
其他書名
Study of subsidence of a highway caused by mining coal beneath
出版U.S. Department of the Interior, Bureau of Mines, 1941
URLhttp://books.google.com.hk/books?id=rrxBdXI3JB4C&hl=&source=gbs_api
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