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- Exhibitions 5
- Agricultural exhibitions 3
- Oregon State University. School of Agriculture 3
- Universities and colleges--Faculty 3
- Boersma, L. 2
- Crop and Soil Science 2
- Employees 2
- Oregon Museum of Science and Industry 2
- Universities and colleges--Alumni and alumnae 2
- Agriculture 1
- Birdhouses 1
- Florists 1
- Fort Rock Valley (Or.) 1
- Fremont National Forest (Or.) 1
- French, Giles 1
- Honeybee 1
- Matson, Walter E. 1
- Mice 1
- Oregon State University. Extension Service 1
- Oregon 1