- Agronomy Research Reports (North Carolina Agricultural Experiment Station)2
- Akehurst, B. C.1
- American Machine and Foundry Company1
- American Society of Agricultural Engineers2
- American Tobacco Company1
- Beeman, J. F. (James F.)2
- Bell, Robert C.1
- Border Belt Tobacco Research Station (Whiteville, N.C.)1
- Bowen, Henry D.1
- CORESTA1
- Campbell, John S.3
- Carreras Rothmans Ltd.10
- Central Crops Research Station (Clayton, N.C.)1
- Chang, Changsoo3
- Cooper, Robert A.2
- Daly, John J., Jr.1
- Djarum Kudus, PT1
- Dolberg, Ulrich1
- Duke University1
- E. I. du Pont de Nemours & Company1