Three coal mine ventilation studies using sulfur hexafluoride tracer gas / by Robert P. Vinson and Fred N. Kissell ; Pittsburgh Mining and Safety Research Center.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
[Washington] :
U.S. Dept. of the Interior, Bureau of Mines,
1976.
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| Series: | Report of investigations (United States. Bureau of Mines) ;
8142. |
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