Denver City Quadrangle, map, 1971; (https://texashistory.unt.edu/ark:/67531/metapth108276/m1/1/: accessed April 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Denver City Quadrangle, map, 1971; (https://texashistory.unt.edu/ark:/67531/metapth108276/m1/1/: accessed April 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .