United States. Bureau of the Census. 2000 Census County Subdivison Block Map: Harlingen-San Benito CCD, Texas, Inset K01, map, 2000; (https://texashistory.unt.edu/ark:/67531/metapth423813/m1/1/: accessed September 22, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .