"Map of Genl. Worth's operations on the 20th of Augt. 1847"
"Map of Genl. Worth's operations on the 20th of Augt. 1847", map, Date Unknown; (texashistory.unt.edu/ark:/67531/metapth32935/: accessed July 21, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; crediting Star of the Republic Museum.