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After Years of Effort, Accident Rates are Still Unacceptably High in Mines Covered by the Federal Metal and Nonmetallic Mine Safety Act, Department of the Interior
United States. General Accounting Office
其他書名
Report to the Congress
出版U.S. General Accounting Office, 1977
URLhttp://books.google.com.hk/books?id=JctAZw7pMB4C&hl=&source=gbs_api
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