| 000 | nam a22 7a 4500 | ||
|---|---|---|---|
| 999 |
_c2233 _d2233 |
||
| 003 | Biblioteca-INTEMIN | ||
| 005 | 20180516232530.0 | ||
| 008 | 180516b xxu||||| |||| 00| 0 eng d | ||
| 080 | _a622.8 | ||
| 110 |
_aU.S. Bureau of mines, Division of Minerals Health and Safety Technology _95631 |
||
| 245 |
_aHelth and safety in-house research development and demostration in fiscal year 1981 _cU.S. Bureau of mines, Division of Minerals Health and Safety Technology |
||
| 260 |
_aWashington _bBureau of mines _c1981 |
||
| 650 |
_aMINERIA _965 |
||
| 650 |
_aRIESGOS _93954 |
||
| 942 | _cBK | ||