| 000 | 00882nam a2200265u 4500 | ||
|---|---|---|---|
| 001 | 00919802 | ||
| 003 | PWmBRO | ||
| 008 | 901120s1990 wau f eng | ||
| 010 | _a 90001512 | ||
| 069 | _a 90065075 | ||
| 090 | 0 |
_aVF _b622.4/2/I34 |
|
| 245 | 0 | 0 |
_aImpact of using auxiliary fans on coal mine ventilation efficiency and cost / _cby Keith G. Wallace, Jr. ... [et al.] |
| 260 | 0 |
_a[Washington] : _bUnited States. Dept. of the interior, Bureau of Mines, _c1990. |
|
| 300 |
_a8 p. : _bill. |
||
| 490 | 1 |
_aReport of investigations ; _v9307 |
|
| 650 | 0 | _aMine ventilation. | |
| 650 | 0 | _aAir flow | |
| 650 | 0 | _aFans (Machinery) | |
| 650 | 0 | _aBrattices (Mining) | |
| 700 | 1 | 0 | _aWallace, Keith G. |
| 710 | 2 | 0 |
_aUnited States. _bBureau of Mines. |
| 830 | 0 |
_aReport of investigations (United States. _bBureau of Mines) ; _v9307 |
|
| 942 | _2ddc | ||
| 994 | 0 | 1 | _a077537 |
| 999 |
_c60533 _d60533 |
||