Jumbo Quadrangle, map, 1968; (https://texashistory.unt.edu/ark:/67531/metapth451195/m1/1/: accessed May 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Jumbo Quadrangle, map, 1968; (https://texashistory.unt.edu/ark:/67531/metapth451195/m1/1/: accessed May 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .