Landon, Charles N. & Crane, Roy, Jr. [Letter from Charles N. Landon to Roy Crane, Jr.], letter, [1915, 1916]; (https://texashistory.unt.edu/ark:/67531/metapth865953/m1/1/: accessed May 20, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .