검색결과 : 2건
| No. | Article |
|---|---|
| 1 |
A geostatistical approach to predicting sulfur content in the Pittsburgh coal bed Watson WD, Ruppert LF, Bragg LJ, Tewalt SJ International Journal of Coal Geology, 48(1-2), 1, 2001 |
| 2 |
A digital resource model of the upper Pennsylvanian Pittsburgh coal bed, Monongahela Group, northern Appalachian basin coal region, USA Ruppert LF, Tewalt SJ, Bragg LJ, Wallack RN International Journal of Coal Geology, 41(1), 3, 1999 |