Oklahoma State Highway System1936-01-01unknownhttp://rightsstatements.org/vocab/NKC/1.0/enghttp://congressarchives.org/record/CAC_CC_010_13_0000_0000_40The Oklahoma State Highway System map from 1936 illustrates traffic density on state and Federal Aid highways in Oklahoma, based on data from March to October. Dimensions: 17 x 20.