[Postcard from H. Studtmann to Reverend R. Osthoff, December 15, 1926], postcard, December 15, 1926; (https://texashistory.unt.edu/ark:/67531/metapth606349/m1/2/: accessed July 11, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .