登入選單

返回Google圖書搜尋

Experience with Electrical and Other Means of Firing Shots of Explosives in the Anthracite Region of Pennsylvania

Spencer Pritchard Howell

出版	U.S. Department of Commerce, Bureau of Mines, 1930
URL	http://books.google.com.hk/books?id=_Z6qwlE0hx4C&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN