Schulz, Paul. [Letter from Paul Schulz to Oliver Harms, October 20, 1948], letter, October 20, 1948; (https://texashistory.unt.edu/ark:/67531/metapth606650/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .