- North Carolina State College. Department of Agricultural Engineering5
- Johnson, William H.4
- North Carolina State University. Department of Biological and Agricultural Engineering4
- Splinter, William E.4
- Suggs, Charles W.4
- American Society of Agricultural Engineers1
- Daly, John J., Jr.1
- E. I. du Pont de Nemours & Company1
- Flue-Cured Tobacco Farmer1
- Fox, William R.1
- Howell, Ezra L.1
- Lambert, Andrew J.1
- Leary, Samuel L. (Samuel Linton), 1863-19131
- Liggett & Myers Tobacco Company1
- National Institute for Medical Research1
- North Carolina Agricultural Extension Service1
- Oxford Tobacco Research Station1
- R.J. Reynolds Tobacco Company1
- Smith, Easley S.1
- Svenska tobaks aktiebolaget1