| 000 | nam a22 7a 4500 | ||
|---|---|---|---|
| 999 |
_c4184 _d4184 |
||
| 003 | Biblioteca-INTEMIN | ||
| 005 | 20180607183709.0 | ||
| 008 | 180607b xxu||||| |||| 00| 0 eng d | ||
| 080 | _a622.807 | ||
| 100 |
_aKissell, Fred _98454 |
||
| 245 |
_aReducing dust at longwall shearers by confining the dust cloud to the face (BM-TPR 111) _cKissell, Fred |
||
| 260 |
_aWashington _bBureau of mines _c1981 |
||
| 650 |
_aCONTROL DEL POLVO EN LA MINA _98455 |
||
| 650 |
_aCONTROL DE LAS CONDICIONES AMBIENTALES _95809 |
||
| 942 | _cBK | ||