| 000 | 00491nam a22001817a 4500 | ||
|---|---|---|---|
| 003 | BD-DhUET | ||
| 008 | 151012b xxu||||| |||| 00| 0 eng d | ||
| 040 |
_c0 _dBD-DhUET |
||
| 082 |
_a624.152 _bDRI/1981 |
||
| 245 |
_aDrill stem _cEdited by J. Leecraft |
||
| 250 | _a2nd ed. | ||
| 260 |
_a Texas _bPetroleum Extension Service _c1981 |
||
| 300 |
_av, 43 p. _bill. _c33 cm. |
||
| 490 | _aRotary drilling | ||
| 500 | _aUnit - 1 , Lesson - 3 | ||
| 650 | 0 | _a Drilling - Rotary | |
| 942 | _cGB | ||
| 999 |
_c34546 _d34546 |
||