Some signaling systems in metal-mine shafts / by McHenry Mosier and E. J. Gleim.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
[Washington, DC] :
U.S. Dept. of the Interior, Bureau of Mines,
1939.
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| Series: | Information circular (United States. Bureau of Mines) ;
7083. |
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| Item Description: | At head of title: Department of Commerce--Bureau of Mines. No.7075-7099 issued bound together. "June 1939" |
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| Physical Description: | 5 pages : illustrations ; 26 cm. |
| Action Note: | committed to retain 20170101 20420101 Alliance Shared Trust https://www.coalliance.org/shared-print-archiving-policies) |