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Recommended Technical Provisions for Construction Practice in Shoring and Sloping of Trenches and Excavations

Felix Y. Yokel

出版	Department of Commerce, National Bureau of Standards, 1980
URL	http://books.google.com.hk/books?id=nSsPT8gM-3YC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN