Huck, Henry J., Jr.. Account-Book., Patent, May 26, 1891; digital images, (http://texashistory.unt.edu/ark:/67531/metapth172706/ : accessed May 22, 2013), University of North Texas Libraries, The Portal to Texas History, http://texashistory.unt.edu; crediting UNT Libraries Government Documents Department, Denton, Texas.
