United States. Bureau of the Census. 1990 Census County Block Map (Recreated): Milam County, Inset D01, map, 1990; (https://texashistory.unt.edu/ark:/67531/metapth361573/m1/1/: accessed April 24, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .