[A mule pulling a plow on a hill], photograph, [1939..1989]; (https://texashistory.unt.edu/ark:/67531/metadc488760/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
[A mule pulling a plow on a hill], photograph, [1939..1989]; (https://texashistory.unt.edu/ark:/67531/metadc488760/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .