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- Dawson, M. D. 49
- Universities and colleges--Faculty 49
- Soil Science 46
- Farmers 8
- Oregon State University. Extension Service 6
- Cannon, L. E. (Lynn E.) 5
- College students 4
- Portraits 4
- Rugby football coaches 4
- Rugby football teams 4
- Sesbania 3
- Universities and colleges--Employees 3
- American Field Service 2
- Fertilizers 2
- International students 2
- Soil profiles 2
- Soils 2
- Georgeson, Lorraine A. 1
- Mahāwitthayālai Kasētsāt 1
- Moore, David Paul, 1931- 1