[Letter from G. D. Ulrich to J. Seinsheimer, December 28, 1932], letter, December 28, 1932; (https://texashistory.unt.edu/ark:/67531/metapth1198175/m1/1/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .