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- Oregon State Agricultural College. Agricultural Experiment Station29
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- Hartman, Henry, 1889 6
- Lovett, A. L. (Arthur Lester), 1885 19245
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- Withycombe, Robert, 1880 5
- Childs, Leroy, 1888 4
- Oregon Agricultural College. Extension Service4
- Oregon State College. Extension Service4
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- Dean, H. K. (Harold Karl), 1889 2
- Dreesen, W. H. (William Henry), 1880 2