Safety practices and achievements at the Columbia Mine of the Columbia Steel Co. (subsidiary of the United States Steel Corporation) / by D.J. Parker.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
[Washington] :
United States Bureau of Mines,
1933.
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| Series: | Information circular (United States. Bureau of Mines) ;
6743. |
| Subjects: |