Preliminary Zoning Districts Plan for the County Area, Ada, Oklahoma and Vicinity1961-01-01unknownhttp://rightsstatements.org/vocab/NKC/1.0/enghttp://congressarchives.org/record/CAC_CC_038_14_0000_1_54This document outlines a map featuring annotations that mark the locations of Robert S. Kerr's cabin and the Southwestern Regional Water Pollution Field Laboratory. It was prepared for the Ada Metropolitan Area Planning Commission. The map is historical, measuring 17 by 14 inches, and includes inscriptions and annotations.