[Textbook Card], text, 1939~; (https://texashistory.unt.edu/ark:/67531/metapth65303/m1/1/: accessed June 11, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
[Textbook Card], text, 1939~; (https://texashistory.unt.edu/ark:/67531/metapth65303/m1/1/: accessed June 11, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .