Gammel, Hans Peter Mareus Neilsen. The Laws of Texas, 1931-1933 [Volume 28], Book, 1933; digital images, (http://texashistory.unt.edu/ark:/67531/metapth17293/ : accessed May 25, 2013), University of North Texas Libraries, The Portal to Texas History, http://texashistory.unt.edu; crediting UNT Libraries, Denton, Texas.
