| 000 | nam a22 7a 4500 | ||
|---|---|---|---|
| 999 |
_c4097 _d4097 |
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| 003 | Biblioteca-INTEMIN | ||
| 005 | 20180606140206.0 | ||
| 008 | 180606b xxu||||| |||| 00| 0 eng d | ||
| 080 | _a622.4 | ||
| 100 |
_aSchlick, D.P. _95081 |
||
| 245 |
_aAn evaluation of the respirable dust sampling program in United States underground coal mines (BM-TPR 32) _cSchlick, D.P. |
||
| 260 |
_aWashington _bBureau of mines _c1971 |
||
| 650 |
_aVENTILACION EN LA MINA _98313 |
||
| 650 |
_aPOLVO EN LA MINA _98357 |
||
| 942 | _cBK | ||