검색결과 : 1건
| No. | Article |
|---|---|
| 1 |
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 |