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Sand Available for Filling Mine Workings in the Northern Anthracite Basin of Pennsylvania

Robert M. Strong (Mechanical engineer)Charles Lathrop ParsonsClarence HallGeorge Arthur BurrellGeorge S. PopeHarold Hayward ClarkHerbert Michael WilsonNelson Horatio DartonSamuel B. FlaggFrank Meyers SeibertLauson StoneSpencer Pritchard Howell

出版	U.S. Government Printing Office, 1912
URL	http://books.google.com.hk/books?id=WiY0LdLSs8wC&hl=&source=gbs_api
EBook	FULL_PUBLIC_DOMAIN