| 000 | nam a22 7a 4500 | ||
|---|---|---|---|
| 999 |
_c3814 _d3814 |
||
| 003 | Biblioteca-INTEMIN | ||
| 005 | 20180531143357.0 | ||
| 008 | 180531b xxu||||| |||| 00| 0 eng d | ||
| 080 | _a622.41 | ||
| 100 |
_aRock, R.L. _98063 |
||
| 245 |
_aMine engineering and ventilation problems unique to the control of radon daughters _cRock, R.L. |
||
| 260 |
_aWashington _bDepartment of labor _c1974 |
||
| 650 |
_aVENTILACION DE MINAS _95096 |
||
| 650 |
_aCONTROL DE LAS CONDICIONES AMBIENTALES _95809 |
||
| 650 |
_aRADON _94924 |
||
| 942 | _cBK | ||