Fehr, Arthur. [Letter from Arthur Fehr to Henry W. Horst, July 23, 1929], letter, July 23, 1929; (https://texashistory.unt.edu/ark:/67531/metapth606491/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .