United States. Bureau of the Census. 1990 Census County Block Map (Recreated): Waller County, Inset B01, map, 1990; (https://texashistory.unt.edu/ark:/67531/metapth360247/m1/1/: accessed May 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .