返回Google圖書搜尋

Measurement of Pressures on Rock Pillars in Underground Mines

其他書名	Part II
出版	U.S. Department of the Interior, Bureau of Mines, 1940
URL	http://books.google.com.hk/books?id=hwE5PqyJ4rsC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN