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Explosions and Other Accidents from Mudcapped Shots in Coal Mines

Daniel HarringtonClarence Watson Owings

出版	U.S. Department of Commerce, Bureau of Mines, 1929
URL	http://books.google.com.hk/books?id=3pu6UbAUZ1wC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN