Bennett, Frank; Lounsbury, Clarence; Burke, R. T. (Richard Thomas Avon); Sweet, A. T. & Wood, Percy O. Soil survey of Grayson County, Texas, book, December 27, 1910; (https://texashistory.unt.edu/ark:/67531/metapth19786/m1/1/: accessed April 30, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .