Studtmann, H. [Letter from H. Studtmann to "Vorsitzer", March 12, 1931], letter, March 12, 1931; (https://texashistory.unt.edu/ark:/67531/metapth606392/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .