Harris, O. C. [Letter from O. C. Harris to Claude D. White, April 3, 1916], letter, April 3, 1916; (https://texashistory.unt.edu/ark:/67531/metapth204125/m1/1/: accessed December 11, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .