About BROWN P
About Peabody Coal Co.
About SMITH R
About Peabody Coal Co.
About WENDT G
About Peabody Coal Co.
About Proceedings. 1980 Symposium on Surface Mining Hydrology, Sedimentology, and Reclamation
About open pit mining
About Colorado
About Damage to plant and animal life
About Open pit mining
About Geohydrology
About コロラド州
About か働
About 採掘炭鉱
About 地下水
About 表土
About 復旧
About 跡地