- American Limestone Company1
- Battle, H. B. (Herbert Bemerton), 1862-19291
- Beasley, Eustace O. (Eustace Orland)2
- Burns, J. C. (Joseph C.)1
- Capitol Agricultural Service and Supply Co.1
- Charlottesville Research Center (Crozet, Va.)3
- Charlottesville Research Center (Ivy, Va.)7
- Collins, E. R. (Emerson Roscoe), 1903-19721
- Corneli Seed Company1
- Covington, H. M.1
- Dabney, Charles William, 1855-19451
- Davenport, R. E.1
- Farm Journal (Philadelphia, Pa. : 1956)1
- Fields, Hugh1
- Forest Science Laboratory (Summerville, S.C.)4
- Giles, G. W. (George Wallace), 1910-20031
- Henson, J. D.1
- J. G. Van Holten and Sons, Inc. (Waterloo, Wisconsin)1
- Jones, Ed1
- Jones, Guy L.1