Copper Breaks State Park, map, February 2015; (https://texashistory.unt.edu/ark:/67531/metapth624443/m1/1/: accessed April 19, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Copper Breaks State Park, map, February 2015; (https://texashistory.unt.edu/ark:/67531/metapth624443/m1/1/: accessed April 19, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .