U.S. Department of Agriculture. Agricultural Research Administration. Office of Experiment Stations. Experiment Station Record, Volume 88, January-June, 1943, book, 1944; (https://digital.library.unt.edu/ark:/67531/metadc5068/m1/1/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .