American Lumberman. [Southern Pine Lumber Company Boilers - 2], Photograph, 1903; digital image, (http://texashistory.unt.edu/ark:/67531/metapth204244/ark:/67531/metapth204244/ : accessed June 18, 2013), University of North Texas Libraries, The Portal to Texas History, http://texashistory.unt.edu; crediting The History Center, Diboll, Texas.
