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Oversight Hearings on the Federal Mine Safety and Health Amendments Act of 1977: Coal, metal, and surface mine construction
United States. Congress. House. Committee on Education and Labor. Subcommittee on Health and Safety
出版
U.S. Government Printing Office
, 1980
URL
http://books.google.com.hk/books?id=ULtFAQAAMAAJ&hl=&source=gbs_api
EBook
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