Analysis of data alternatives and management procedures for rail system planning : consultants' report to the Illinois Department of Transportation / Donald W. Maxfield, Charles E. Trott. Maxfield, Donald W. Trott, Charles E., joint author. Illinois. Department of Transportation. Railroads Illinois. Freight and freightage Illinois. Transportation Illinois Planning. HE2771.I4 M39 658.4038 HAI Includes bibliographies. DeKalb, Ill. : Maxfield, 1975. 1975. 1975 Text 5 v. : eng Illinois. Illinois. Illinois