- North Carolina Cooperative Extension Service13
- Slingerland, M. V. (Mark Vernon), 1864-190912
- Graeber, R. W. (Robert Walter), 1888-19678
- MeadWestvaco (Firm)4
- North Carolina Agricultural Experiment Station4
- Jeter, F. H. (Frank Hamilton), 1891-19552
- North Carolina State College. Department of Plant Pathology2
- Slingerland, Effie Brown Earll2
- Brannon, C. H. (Clarence Ham), 1900-19691
- Campbell Heating Co.1
- Carolina Trucking Development Company1
- Davenport, R. E.1
- North Carolina Agricultural Extension Service1
- North Carolina State College. Department of Agronomy1
- North Carolina State College. Department of Field Crops1
- North Carolina State University -- Research1
- North Carolina State University. College of Forest Resources1
- North Carolina State University. Department of Biological and Agricultural Engineering1
- Page, Rufus H.1
- Splinter, William E.1