Geology of the forty-ninth parallel sheet no. 11, map 84 A, map, 1913; (https://texashistory.unt.edu/ark:/67531/metapth187405/m1/2/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Geology of the forty-ninth parallel sheet no. 11, map 84 A, map, 1913; (https://texashistory.unt.edu/ark:/67531/metapth187405/m1/2/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .