Vegetation Types of Texas, map, September 2006; (https://texashistory.unt.edu/ark:/67531/metapth637409/m1/1/: accessed September 28, 2023), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Vegetation Types of Texas, map, September 2006; (https://texashistory.unt.edu/ark:/67531/metapth637409/m1/1/: accessed September 28, 2023), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .