| 000 | nam a22 7a 4500 | ||
|---|---|---|---|
| 999 |
_c3321 _d3321 |
||
| 003 | Biblioteca INTEMIN | ||
| 005 | 20180528170049.0 | ||
| 007 | ta | ||
| 008 | 180527b xxu||||| |||| 00| 0 eng d | ||
| 041 | _ainglés | ||
| 080 | _a622 | ||
| 100 |
_aKrech, Warren W. _93547 |
||
| 245 |
_aA standard rock suite for rapid excavation research _cKrech, Warren W.; Henderson, Frank A.; Hjelmstad, Kenneth E. |
||
| 260 |
_aWashington _bBureau of mines _c1974 |
||
| 300 | _a29 p. | ||
| 440 |
_aRI 7865 _97181 |
||
| 650 |
_aMINERIA _93338 |
||
| 650 |
_aMINING _92163 |
||
| 653 | _aEXCAVACION | ||
| 653 | _aMECANICA DE ROCAS | ||
| 653 | _aEXCAVATION | ||
| 653 | _aROCK MECHANICS | ||
| 700 |
_91224 _aHenderson, Frank A. |
||
| 700 |
_aHjelmstad, Kenneth E. _91850 |
||
| 942 |
_2udc _cCR |
||