| 000 | 00439nam a2200157Ia 4500 | ||
|---|---|---|---|
| 008 | 130223s9999 xx 000 0 und d | ||
| 080 | _a622.2(063) | ||
| 245 | _aDrilling technology and engineering aids to geological exploration : Proceedings | ||
| 260 | _aCalcutta | ||
| 260 | _bGeological Survey of India | ||
| 260 | _c1980 | ||
| 300 | _a637 p. | ||
| 440 | _aNo. 4; Geological Survey of In | ||
| 901 | _pS40325 | ||
| 942 |
_cB _2udc |
||
| 999 |
_c120227 _d120227 |
||