KOCO-TV, Docket 14231 Studies, Calculated City Grade Contours1957-01-01unknownhttp://rightsstatements.org/vocab/NKC/1.0/enghttp://congressarchives.org/record/CAC_CC_038_14_0000_2_79This document features a topographic map, identified as Figure 4, measuring 11 x 8 1/2 inches, with the reference number 611121.