| 000 | nam a22 7a 4500 | ||
|---|---|---|---|
| 999 |
_c3953 _d3953 |
||
| 003 | Biblioteca INTEMIN | ||
| 005 | 20180603125518.0 | ||
| 007 | ta | ||
| 008 | 180527b xxu||||| |||| 00| 0 eng d | ||
| 041 | _ainglés | ||
| 080 | _a622 | ||
| 100 |
_aTandanand, Sathit _93547 |
||
| 245 |
_aDrillability determination : a drillability index for percussion drills _cTandanand, Sathit; Unger, Harold F. |
||
| 260 |
_aWashington _bBureau of mines _c1975 |
||
| 300 | _a20 p. | ||
| 440 |
_aRI 8073 _97181 |
||
| 650 |
_aMINERIA _93338 |
||
| 650 |
_aMINING _92163 |
||
| 653 | _aMAQUINARIA PARA LA INDUSTRIA MINERA | ||
| 653 | _aPERFORACION | ||
| 653 | _aMINING MACHINERY | ||
| 653 | _aDRILLING AND BORING | ||
| 700 |
_aUnger, Harold F. _98208 |
||
| 942 |
_2udc _cCR |
||