- North Carolina State University. Department of Biological and Agricultural Engineering21
- Johnson, William H.16
- North Carolina State University -- Research12
- Splinter, William E.6
- Suggs, Charles W.5
- North Carolina State College. Department of Agricultural Engineering4
- Beeman, J. F. (James F.)2
- Bell, Robert C.1
- Carreras Rothmans Ltd.1
- Central Crops Research Station (Clayton, N.C.)1
- Daly, John J., Jr.1
- Dolberg, Ulrich1
- E. I. du Pont de Nemours & Company1
- Flue-Cured Tobacco Farmer1
- General Cigar Company1
- J.L. Tiedemanns tobaksfabrik1
- Keller, Kenneth Raymond1
- Liggett & Myers Tobacco Company1
- Martin Brinkmann AG Bremen1
- National Cotton Council of America1