Grass, Legume and Forb Cultivation, photograph, July 13, 1955; (https://gateway.okhistory.org/ark:/67531/metadc1936144/m1/1/: accessed July 12, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .
Grass, Legume and Forb Cultivation, photograph, July 13, 1955; (https://gateway.okhistory.org/ark:/67531/metadc1936144/m1/1/: accessed July 12, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .