nils paper addresses the issue of aquot;approximate original contour. ... Bureau of Mines; July, 1976, prepared under contract by Hathtech, a division of Mathematics, and Ford, Bacon and Davis Utah Inc. , a subsidiary of Ford, Bacon and Davis ianbsp;...
|Title||:||Reclamation practices and environmental problems of surface mining|
|Author||:||United States. Congress. House. Committee on Interior and Insular Affairs. Subcommittee on energy and the Environment|