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Permissible Explosives Tested Prior to January 1, 1911 and Precautions to be Taken in Their Use

Clarence Hall

出版	U.S. Government Printing Office, 1911
URL	http://books.google.com.hk/books?id=tJzZuqezKUoC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN