Safety organizations at Lake Superior iron mines / 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. Bureau of Mines,
1932.
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| Series: | Technical paper (United States. Bureau of Mines) ;
515. |
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| Physical Description: | ii, 32 pages : including tables, diagram ; 23 cm. |
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| Bibliography: | Bibliographical references included. |