Sullivan City Quadrangle, map, 1980; (https://texashistory.unt.edu/ark:/67531/metapth105118/m1/1/: accessed April 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Sullivan City Quadrangle, map, 1980; (https://texashistory.unt.edu/ark:/67531/metapth105118/m1/1/: accessed April 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .