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Tests on the Ignition of Natural Gas-air Mixtures by Permissible Explosives in the Experimental Coal Mine

Harold Putnam GreenwaldHenry C. HowarthJohn NagyIrving Hartmann

出版	U.S. Government Printing Office, 1949
URL	http://books.google.com.hk/books?id=sdM8CH1PcAYC&hl=&source=gbs_api