- Covington, H. M.✖[remove]7
- North Carolina Agricultural Extension Service4
- North Carolina Cooperative Extension Service3
- Brett, Charles H. (Charles Henry), 1909-19782
- Scott, H. E.2
- Wells, J. C. (Jay C.), 1921-20132
- Westmoreland, William C. (William Childs), 1914-20052
- Boal, Bob1
- Capitol Agricultural Service and Supply Co.1
- Cochran, Fred Derward, 1910-1
- Collins, E. R. (Emerson Roscoe), 1903-19721
- Corneli Seed Company1
- Ellis, H. M.1
- Farm Journal (Philadelphia, Pa. : 1956)1
- Garriss, Howard R. (Howard Reed), 1909-19761
- J. G. Van Holten and Sons, Inc. (Waterloo, Wisconsin)1
- Jones, George D., 1904-1
- Lee, W. D. (William Daniel), 1896-19901
- Lockwood Grader Corporation1
- Morris, Mildred1