United States. Bureau of the Census. P.L. 94-171 County Block Map (2010 Census): Dallas County, Block 7, map, January 12, 2011; (https://texashistory.unt.edu/ark:/67531/metapth382295/m1/1/: accessed April 27, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .