| 000 | 00297pam a2200097a 44500 | ||
|---|---|---|---|
| 082 |
_aTR _bRI-8575 |
||
| 100 | _aA. T. Iannacehione | ||
| 245 | 1 | _aGeologic factoro in predecting coal mine roof-rock stability in the upper kittanning coalbed,somerset country,Pa. | |
| 260 |
_a _b _c |
||
| 997 | _aTR239 C | ||
| 999 |
_c404712 _d404712 |
||