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- 91010026 contributor B6360160.
- 91010026 contributor B6360161.
- 91010026 created "1991.".
- 91010026 date "1991".
- 91010026 date "1991.".
- 91010026 dateCopyrighted "1991.".
- 91010026 description "Includes bibliographical references (p. 11).".
- 91010026 extent "11 p. :".
- 91010026 isPartOf "Report of investigations (United States. Bureau of Mines) ; 9377.".
- 91010026 isPartOf "Report of investigations / United States Department of the Interior, Bureau of Mines ; 9377".
- 91010026 issued "1991".
- 91010026 issued "1991.".
- 91010026 language "eng".
- 91010026 publisher "Washington, D.C. (2401 E St., N.W., MS #9800, Washington 20241-0001) : U.S. Dept. of the Interior, Bureau of Mines,".
- 91010026 subject "622 s 622/.82 20".
- 91010026 subject "ELF electromagnetic fields.".
- 91010026 subject "Fire alarms.".
- 91010026 subject "Mine fires Prevention and control.".
- 91010026 subject "TN23 .U43 no. 9377 TN315".
- 91010026 title "Ultra low frequency electromagnetic fire alarm system for underground mines / by K.E. Hjelmstad and W.H. Pomroy.".
- 91010026 type "text".