Marlboro Canyon Quadrangle, map, 2010; (https://texashistory.unt.edu/ark:/67531/metapth212110/m1/1/: accessed May 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Marlboro Canyon Quadrangle, map, 2010; (https://texashistory.unt.edu/ark:/67531/metapth212110/m1/1/: accessed May 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .