Carter, William T. (William Thomas); Bauer, A. H.; Stroud, J. F.; Francis, W. B. & Bushnell, T. M. (Thomas Mark). Soil survey of Dallas County, Texas, book, 1924; (https://texashistory.unt.edu/ark:/67531/metapth19799/m1/49/: accessed July 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .