Safety inspections in and around iron mines in the Lake Superior district / by F.S. Crawford.
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Main Author: | |
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Format: | Government Document Book |
Language: | English |
Published: |
Washington, D.C. :
U.S. Dept. of Commerce, Bureau of Mines,
1931.
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Series: | Information circular (United States. Bureau of Mines) ;
6507. |
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Item Description: | At head of title: Department of Commerce--Bureau of Mines. No.6501-6525 issued bound together. |
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Physical Description: | 7 pages : illustrations ; 27 cm. |