Preliminary chart of entrance to Brazos River, Texas / from a trigonometrical survey under the direction of A. Bache ; triangulation by J.S. Williams ; topography by J.M. Wampler ; hydrography by the parties under the command of E.J. De Haven & J.K. Duer., map, 1858; (https://texashistory.unt.edu/ark:/67531/metapth2473/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .