Smithson Valley Quadrangle, map, 1940; (https://texashistory.unt.edu/ark:/67531/metapth445267/m1/1/: accessed June 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Smithson Valley Quadrangle, map, 1940; (https://texashistory.unt.edu/ark:/67531/metapth445267/m1/1/: accessed June 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .