Alpine North Quadrangle, map, 1975; (https://texashistory.unt.edu/ark:/67531/metapth457148/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Alpine North Quadrangle, map, 1975; (https://texashistory.unt.edu/ark:/67531/metapth457148/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .