- North Carolina Agricultural Experiment Station690
- North Carolina Cooperative Extension Service38
- United States. Department of Agriculture21
- North Carolina. Department of Agriculture18
- Sandhills Research Station (Jackson Springs, N.C.)18
- Fox, John W.13
- Method Experiment Station (Raleigh, N.C.)13
- Oxford Tobacco Research Station13
- Hill, R.G.11
- North Carolina State University. Department of Communication9
- Mattox, John8
- Graeber, R. W. (Robert Walter), 1888-19677
- North Carolina Agricultural Extension Service7
- Jeter, F. H. (Frank Hamilton), 1891-19556
- North Carolina Agricultural Research Service6
- Siddell Studio6
- Everglades Experiment Station5
- North Carolina State University -- History5
- Border Belt Tobacco Research Station (Whiteville, N.C.)4
- Central Crops Research Station (Clayton, N.C.)4