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Creator
- McCune, Bruce 29
- Oregon Century Farm & Ranch Program 26
- Olsen & Johnson 10
- Turpin, W. S. 10
- Barber, George Franklin 9
- Skidmore, Owings & Merrill 9
- Loggie, Peter 8
- Turpen, William S. 8
- Folsom, George 7
- unknown 7
- Chandler, William G. 6
- Dougan, Luther L. 6
- Houghtaling & Dougan 6
- Houghtaling, Chester A. 6
- Conway, F. E. 5
- Henderson, Robert W. (Robert Wesley), 1914-2006 5
- Hummel, Frank 5
- McCullough, Conde Balcom 4
- Mercer-Fraser Company 4
- Crop and Soil Science 3