Results of experiments related to contact of mine-spoils water with coal, West Decker and Big Sky Mines, southeastern Montana / by Robert E. Davis and Kent A. Dodge (U.S. Geological Survey water-resources investigations report ; 86-4002)
Results of experiments related to contact of mine-spoils water with coal, West Decker and Big Sky Mines, southeastern Montana / by Robert E. Davis and Kent A. Dodge