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U.S. Bureau of Mines New Developments in Mine Communication.
Proc 3rd WVU Conf on Coal Mine Electrotechnology 1976 Aug; :13-1--13-9
Proc. 3rd WVU Conf. on Coal Mine Electrotechnology, August 4-6, 1976, PP. 13-1 to 13-9
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division