Stelzer, F. H. [Letter from F. H. Stelzer to George J. Beto, March 20, 1947], letter, March 20, 1947; (https://texashistory.unt.edu/ark:/67531/metapth591387/m1/1/: accessed January 22, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .