Ultra low frequency electromagnetic fire alarm system for underground mines
By: by K.E. Hjelmstad and W.H. Pomroy.
Contributors: Pomroy, William H.
Series: Report of investigations / United States Department of the Interior, Bureau of Mines ;; 9377; Report of investigations (United States. Bureau of Mines) ;; 9377.
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1991
Place of publication: Washington, D.C. (2401 E St., N.W., MS #9800, Washington 20241-0001)
Language: eng
Number of pages: 11
Subjects: Mine fires -- Prevention and control.; Fire alarms.; ELF electromagnetic fields.
Notes: Includes bibliographical references (p. 11).