Tarleton State University. College of Business Administration. Cross Timbers Business Report, Volume 23, Number 2, Winter 2010, periodical, Winter 2010; (https://texashistory.unt.edu/ark:/67531/metapth284682/m1/1/: accessed April 22, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .