Twelfth Armored Division Association (U.S.). Hellcat News, (Seward, Neb.), Vol. 44, No. 8, Ed. 1, April 1991, newspaper, April 1991; (https://texashistory.unt.edu/ark:/67531/metapth410028/m1/1/: accessed April 5, 2020), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .