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Injury Experience in the Quarry Industry, Detailed Analysis of Safety Factors and Related Employment Data

Eugene Delos GardnerHarold Putnam GreenwaldHarry Blackburn HillUnited States. Bureau of MinesWilliam Waugh AdamsChase Elverton SuttonGeorge Edward McElroySpencer Pritchard HowellGeorge W. Jones

出版	U.S. Government Printing Office, 1927
URL	http://books.google.com.hk/books?id=q3JAvAEACAAJ&hl=&source=gbs_api