About SCHEINER B J
About U.S. Bureau of Mines, Alabama
About SMELLEY A G
About U.S. Bureau of Mines, Alabama
About Proceedings. 1980 Symposium on Surface Mining Hydrology, Sedimentology, and Reclamation
About mine
About USA
About Debris dam
About Damage to plant and animal life
About 粘土質
About スライム
About 脱水