United States. Bureau of the Census. 1990 Census County Block Map (Recreated): Tom Green County, Inset C12, map, 1990; (https://texashistory.unt.edu/ark:/67531/metapth357583/m1/1/: accessed September 24, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .