Campbell, Thomas Mitchell. Message of Governor T.M. Campbell to the thirtieth legislature of Texas, to which is appended the State Democratic Platform adopted at Dallas, Texas, August 13, 1906., Book, January 16, 1907; digital images, (http://texashistory.unt.edu/ark:/67531/metapth5859/ : accessed May 21, 2013), University of North Texas Libraries, The Portal to Texas History, http://texashistory.unt.edu; crediting UNT Libraries, Denton, Texas.
