United States. Bureau of the Census. 2000 Census County Subdivison Block Map: Harrold-Oklaunion CCD, Texas, Block 6, map, 2000; (https://texashistory.unt.edu/ark:/67531/metapth418332/m1/1/: accessed December 12, 2017), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .