R.G. LeTourneau, Inc. Pulpwood Transporter, LeTourneau, Inc., photograph, April 1, 1960; (https://texashistory.unt.edu/ark:/67531/metapth1626994/m1/1/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .