Rand McNally and CompanyAlso shows locations where Pure Oil Company's products could be obtained.; "Copyright by Rand McNally & Company, Chicago, Ill."; Indexed.; Includes text and ancillary maps of North Central United States and Chicago on verso.; Code used for dating map in lower left corner: "K-9."59 x 39 centimetersJPEGUMN_ALMA:9937246040001701engRand McNally (Chicago, Ill)PublicPure Oil pathfinder for IllinoisMapsIllinois1929University of Minnesota