Pawnee Steam Tractor Show, photograph, May 1997; (https://gateway.okhistory.org/ark:/67531/metadc1688875/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .
Pawnee Steam Tractor Show, photograph, May 1997; (https://gateway.okhistory.org/ark:/67531/metadc1688875/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .