| 000 | 01336pam a2200289 a 4500 | ||
|---|---|---|---|
| 999 |
_c1050 _d1050 |
||
| 001 | 3431607 | ||
| 003 | Biblioteca de INTEMIN | ||
| 005 | 20180501130148.0 | ||
| 008 | 910208s1991 dcua b f000 0 eng | ||
| 010 | _a 91010026 | ||
| 040 |
_aDLC _cDLC _dDLC |
||
| 050 | 0 | 0 |
_aTN23 _b.U43 no. 9377 _aTN315 |
| 082 | 0 | 0 |
_a622 s _a622/.82 _220 |
| 100 | 1 |
_aHjelmstad, Kenneth E. _91850 |
|
| 245 | 1 | 0 |
_aUltra low frequency electromagnetic fire alarm system for underground mines / _cby K.E. Hjelmstad and W.H. Pomroy. |
| 260 |
_aWashington, D.C. (2401 E St., N.W., MS #9800, Washington 20241-0001) : _bU.S. Dept. of the Interior, Bureau of Mines, _c1991. |
||
| 300 |
_a11 p. : _bill. ; _c28 cm. |
||
| 490 | 1 |
_aReport of investigations / United States Department of the Interior, Bureau of Mines ; _v9377 |
|
| 504 | _aIncludes bibliographical references (p. 11). | ||
| 650 | 0 |
_aMine fires _xPrevention and control. _92199 |
|
| 650 | 0 |
_aFire alarms. _91853 |
|
| 650 | 0 |
_aELF electromagnetic fields. _93300 |
|
| 700 | 1 |
_aPomroy, William H. _93301 |
|
| 830 | 0 |
_aReport of investigations (United States. Bureau of Mines) ; _v9377. _9793 |
|
| 906 |
_a7 _bcbc _corignew _d1 _eocip _f19 _gy-gencatlg |
||
| 942 |
_2udc _cCR |
||