United States. Bureau of the Census. P.L. 94-171 County Block Map (2010 Census): Matagorda County, Inset J04, map, December 10, 2010; (https://texashistory.unt.edu/ark:/67531/metapth385851/m1/1/: accessed July 7, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .