Mechanized mining brings new electrical hazards /
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington, D.C. :
U.S. Dept of the Interior, Bureau of Mines,
1941
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| Series: | Information circular (United States. Bureau of Mines)
7160 |
| Subjects: |