State mining laws on the use of electricity in and about coal mines / by L.C. Ilsley.
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| Other title: | Mining laws on use of electricity in coal mines. |
| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington :
Govt. Print. Off,
1920.
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| Series: | Technical paper (United States. Bureau of Mines) ;
271. |
| Subjects: |