- North Carolina Cooperative Extension Service17
- United States. Forest Service15
- Hofmann, Julius Valentine14
- North Carolina Agricultural Extension Service14
- Weyerhauser Sales Co.14
- Harrill, L. R. (Lera Rhinehart), 1897-197813
- Schenck, Adele13
- Shoffner, R. W. (Robert Worth), 1902-199512
- North Carolina Forestry Foundation11
- North Carolina State University -- Congresses11
- Crampton and Deitrick10
- North Carolina State Fair10
- North Carolina Forestry Association9
- North Carolina State University -- Faculty9
- Fox, John W.8
- Grant, B. E.8
- Guastavino, Rafael, 1842-19088
- Hunt, Richard Howland8
- Hunt, Richard Morris, 1828-18958
- McCrary, O. F.8