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- Mine pager to public telephone interconnect system
- Mine communications :proceedings: Bureau of Mines Technology Transfer Seminar, Bruceton, Pa., March 21-22, 1973
- An electromagnetic system for detecting and locating trapped miners
- Seismic detection of trapped miners using in-mine geophones
- Underground mine communications(in four parts) :
- Underground mine communications(in four parts) :
- Underground mine communications(in four parts) :
- Underground mine communications(in four parts) :