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Administration of the Federal Coal-Mine Safety Act, 1952-58
United States. Division of Coal Mine Inspection
James Westfield
H. F. Weaver
C. M. Keenan
出版
U.S. Department of the Interior, Bureau of Mines
, 1959
URL
http://books.google.com.hk/books?id=N23a7PkGzOoC&hl=&source=gbs_api
EBook
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