| 000 | nam a22 7a 4500 | ||
|---|---|---|---|
| 999 |
_c2258 _d2258 |
||
| 003 | Biblioteca-INTEMIN | ||
| 005 | 20180517134144.0 | ||
| 008 | 180517b xxu||||| |||| 00| 0 eng d | ||
| 080 | _a622.88 | ||
| 100 |
_aDerby, G.K. _95664 |
||
| 245 |
_aReduction of airborne contaminants from welding exhaust at surface mines _cDerby, G.K. |
||
| 260 |
_aWashington _bBureau of mines _c1982 |
||
| 650 |
_aMINERIA _965 |
||
| 650 | 0 |
_94263 _aCONTROL DE PROCESOS |
|
| 942 | _cBK | ||