| 000 | 01043pam a2200277 a 4500 | ||
|---|---|---|---|
| 999 |
_c4502 _d4502 |
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| 001 | 1420755 | ||
| 003 | Biblioteca de INTEMIN | ||
| 005 | 20180710133320.0 | ||
| 008 | 830525s1983 dcua b f000 0 eng | ||
| 010 | _a 83600164 | ||
| 040 |
_aDLC _cDLC _dDLC |
||
| 050 | 0 | 0 |
_aTN23 _b.U43 no. 8828 _aTN344 |
| 082 | 0 | 0 |
_a622 s _a622 _219 |
| 086 | 0 | _aI 28.23:8828. | |
| 100 | 1 |
_aDurkin, John. _93143 |
|
| 245 | 1 | 0 |
_aVertical magnetic noise in the voice frequency band within and above coal mines / _cby John Durkin. |
| 260 |
_a[Washington, D.C.] : _bU.S. Dept. of the Interior, Bureau of Mines, _c1983. |
||
| 300 |
_a27 p. : _bill. ; _c28 cm. |
||
| 490 | 1 |
_aReport of investigations ; _v8828 |
|
| 504 | _aBibliography: p. 21-22. | ||
| 650 | 0 |
_aCoal mines and mining _xCommunication systems. _98854 |
|
| 650 | 0 |
_aElectromagnetic noise. _98855 |
|
| 650 | 0 |
_aVoice frequency. _98856 |
|
| 830 | 0 |
_aReport of investigations (United States. Bureau of Mines) ; _v8828. _9793 |
|
| 906 |
_a7 _bcbc _corignew _d1 _encip _f19 _gy-gencatlg |
||
| 942 |
_2udc _cCR |
||