David M. Warren, in the Eugene C. Barker Texas History Center, on the Occasion of
His Being Presented an Award of Merit of the American Association for State and
Texas State Historical Association. The Southwestern Historical Quarterly, Volume 62, July 1958 - April, 1959. Austin, Texas. The Portal to Texas History. http://texashistory.unt.edu/ark:/67531/metapth101173/. Accessed March 3, 2015.