| 000 | nam a22 7a 4500 | ||
|---|---|---|---|
| 999 |
_c2667 _d2667 |
||
| 003 | Biblioteca-INTEMIN | ||
| 005 | 20180521192600.0 | ||
| 008 | 180521b xxu||||| |||| 00| 0 eng d | ||
| 080 | _a622.06 | ||
| 100 |
_aRoepke, Wallace W. _92356 |
||
| 245 |
_aBureau of mines coal cutting technology facilities at the twin cities research center _cRoepke, Wallace W. |
||
| 260 |
_aWashington _bBureau of mines _c1983 |
||
| 650 |
_aMINERIA _965 |
||
| 650 |
_aTECNOLOGIA MINERA _95207 |
||
| 942 | _cBK | ||