| 000 | nam a22 7a 4500 | ||
|---|---|---|---|
| 999 |
_c4044 _d4044 |
||
| 003 | Biblioteca-INTEMIN | ||
| 005 | 20180605151714.0 | ||
| 008 | 180605b xxu||||| |||| 00| 0 eng d | ||
| 080 | _a622.807 | ||
| 100 |
_aTomb, Thomas F. _97008 |
||
| 245 |
_aStandard calibration and maintenance procedures for wt test meters and coal mine respirable dust samplers _cTomb, Thomas F. |
||
| 260 |
_aWashington _bDepartment of interior _c1978 |
||
| 650 |
_aCONTROL DE POLVO EN LAS MINAS _97616 |
||
| 650 |
_aCONTROL DE LAS CONDICIONES AMBIENTALES _95809 |
||
| 942 | _cBK | ||