Experimental Soil-cement, photograph, May 1, 1947; (https://gateway.okhistory.org/ark:/67531/metadc2019454/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .
Experimental Soil-cement, photograph, May 1, 1947; (https://gateway.okhistory.org/ark:/67531/metadc2019454/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Gateway to Oklahoma History, gateway.okhistory.org; .