| 000 | nam a22 7a 4500 | ||
|---|---|---|---|
| 999 |
_c4136 _d4136 |
||
| 003 | Biblioteca-INTEMIN | ||
| 005 | 20180606205955.0 | ||
| 008 | 180606b xxu||||| |||| 00| 0 eng d | ||
| 080 | _a622.4 | ||
| 100 |
_aSchutz, L.A. _98404 |
||
| 245 |
_aAirborne asbestos fiber concentrations in asbestos mines and mills in the United States (BM-TPR 72) _cSchutz, L.A. |
||
| 260 |
_aWashington _bBureau of mines _c1973 |
||
| 650 |
_aVENTILACION EN LA MINA _98313 |
||
| 650 |
_aMINAS DE AMIATO _98405 |
||
| 650 |
_aCONTROL DE LAS CONDICIONES AMBIENTALES _95809 |
||
| 942 | _cBK | ||