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1
Manual for abandoned underground mine inventory and risk assessment
[Washington, D.C.] : [Springfield, Va. : U.S. Dept. of Transportion, Federal Highway Administration, Office of Infrastructure ; Available from the National Technical Information Service, 1999Format: Book
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2
Manual for abandoned underground mine inventory and risk assessment
[Washington, D.C.] : [Springfield, Va. : U.S. Dept. of Transportation, Federal Highway Administration, Office of Infrastructure ; Available from the National Technical Information Service, 1999Format: Government Document Book
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3
Manual for abandoned underground mine inventory and risk assessment
[Washington, D.C.] : [Springfield, Va.] : U.S. Dept. of Transportion, Federal Highway Administration, Office of Infrastructure ; [Available from the National Technical Information Service], 1999Format: Government Document Book