An electromagnetic system for detecting and locating trapped miners /

Bibliographic Details

Main Author:	Powell, James A.
Corporate Author:	United States. Bureau of Mines
Format:	Government Document Book
Language:	English
Published:	Washington : U.S. Dept. of Commerce, Bureau of Mines, 1976.
Series:	Report of investigations (United States. Bureau of Mines) ; 8159.
Subjects:	Mine communication systems. Mine safety.