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Google圖書搜尋
Permissible Explosives Approved Prior to June 30, 1927
George St. John Perrott
Spencer Pritchard Howell
出版
Department of Commerce, Bureau of Mine
, 1927
URL
http://books.google.com.hk/books?id=HzoIHQAACAAJ&hl=&source=gbs_api