Meyer, A. H. (Alfred Henry); Eckmann, E. C.; Cantrell, L. & Davis, L. V. Soil survey of Washington County, Texas, book, January 26, 1915; (https://texashistory.unt.edu/ark:/67531/metapth19826/m1/7/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .