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- Oregon Agricultural College. Experiment Station25
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- Pernot, E. F. (Emile Francis), 185910
- Lewis, C. I. (Claude Isaac), 1880 19248
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- United States. Division Of Forestry8
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- Withycombe, James, 1854 7
- Cordley, A. B. (Arthur Burton), 1864 19365
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- Oregon State Agricultural College4
- Oregon State Agricultural College. Experiment Station4
- United States. Division Of Entomology4
- United States. Forest Service4
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- Wilson, H. F. (Harley Frost), 1883 3
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