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| 999 |
_c3050 _d3050 |
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| 003 | Biblioteca-INTEMIN | ||
| 005 | 20180523234713.0 | ||
| 008 | 180523b xxu||||| |||| 00| 0 eng d | ||
| 080 | _a622.807 | ||
| 100 |
_aCecala, Andrew B. _91794 |
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| 245 |
_aImpact of background sources on dust exposure of bag machine operator _cCecala, Andrew B. |
||
| 260 |
_aWashington _bBureau of mines _c1986 |
||
| 650 |
_aCONTROL DE POLVOS EN LA MINA _96841 |
||
| 942 | _cBK | ||