An electromagnetic system for detecting and locating trapped miners

Author:	Powell, James A.
Year:	1976
Document Type:	BMRA
Issuing Agency:	U.S. Dept. of the Interior, Bureau of Mines,
SUDOC:	I 28.23:8159
Series:	Report of investigations - Bureau of Mines ;
Report Number:	8159
Subjects:	Mine safety
	Mine communication systems
Link:	https://hdl.handle.net/2027/mdp.39015078474296