Fehr, Arthur. [Letter from Arthur Fehr to Henry W. Horst, August 5, 1929], letter, August 5, 1929; (https://texashistory.unt.edu/ark:/67531/metapth606503/m1/1/: accessed November 19, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .