Mining Publication: Underground Mine Communications (in Four Parts): 2. Paging Systems
This Bureau of Mines report summarizes the research, development, and evaluation demonstrations conducted by the Bureau of Mines under the Coal Mine Health and Safety Act of 1969 to improve the means of notifying miners underground, who are away from their own phone, that they are being called.
Information CircularJanuary - 1977
NIOSHTIC2 Number: 10001367
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, IC 8743, 1977 Jan; :1-37