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 |
Preserving natural environments on coal lands minimum cost Watson WD Energy Journal, 17(1), 91, 1996 |