Sketch of the operations of the 1st Division United States Army under the command of General Worth on the 8th Sept. 1847 battle of El Molino del Rey, map, 1847; (https://texashistory.unt.edu/ark:/67531/metapth192573/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .