- North Carolina. Department of Agriculture✖[remove]40
- North Carolina Agricultural Experiment Station20
- United States. Department of Agriculture18
- Graham, James A., 1921-6
- North Carolina Agricultural Extension Service3
- James, H. Brooks (Herman Brooks), 1912-19732
- Knight, Kenneth L. (Kenneth Lee), 1915-2
- Lower Coastal Plain Tobacco Research Station (Greenville, N.C.)2
- North Carolina State College2
- North Carolina State University2
- North Carolina State University. School of Agriculture and Life Sciences2
- Oxford Tobacco Research Station2
- Reynolds, Hal2
- Technician (Raleigh, N.C.)2
- Bennett, Landis S. (Landis Seawell), 1908-1
- Border Belt Tobacco Research Station (Whiteville, N.C.)1
- Central Crops Research Station (Clayton, N.C.)1
- Coastal Plain Research Station (Willard, N.C.)1
- Horticultural Crops Research Station (Castle Hayne, N.C.)1
- Johnson, William H.1