"1950 Preliminary Census Figures for Each County in the State of Oklahoma"1950-01-01unknownhttp://rightsstatements.org/vocab/NKC/1.0/enghttp://congressarchives.org/record/CAC_CC_001_9_0000_3_75The plan outlines a map of the state of Oklahoma, showing preliminary 1950 census figures for each county. The data ranges from 4,581 in Cimarron County to 322,520 in Oklahoma County. The map is part of the Albut Maps collection, specifically item 75.