Grass, Legume and Forb Cultivation, photograph, May 21, 1956; (https://gateway.okhistory.org/ark:/67531/metadc1936072/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .
Grass, Legume and Forb Cultivation, photograph, May 21, 1956; (https://gateway.okhistory.org/ark:/67531/metadc1936072/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .