The general passenger fare investigation / [by] Emmette S. Redford. Redford, Emmette Shelburn, 1904- Airlines Rates United States. JK21 .I575 no. 56 350 ING Indianapolis, Published for the ICP by Bobbs-Merrill [1960] [1960] 1960 Text 56 p. eng Inter-university Case Program. Case study, no. 56 ICP case series ; no. 56. United States.