Humphrey, H. B. (Harry Baker), 1873-1955; Johnson, Aaron G. & McKinney, Harold H. Take-All of Wheat and Its Control, pamphlet, 1921; (https://digital.library.unt.edu/ark:/67531/metadc97243/m1/1/: accessed May 23, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .