Spencer, Maury. [Letter from Maury Spencer to Miss Jeanne Bertig, April 27, 1906], letter, April 27, 1906; (https://texashistory.unt.edu/ark:/67531/metapth884791/m1/1/: accessed May 20, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .