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Critical-load Studies of a Shield Support

Thomas M. BarczakDavid E. Schwemmer

出版	U.S. Department of the Interior, Bureau of Mines, 1987
URL	http://books.google.com.hk/books?id=EuiPKmRaC3oC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN