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- Oregon State Agricultural College. Agricultural Experiment Station33
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- Hartman, Henry, 1889 10
- Powers, W. L. (Wilbur Louis), 18879
- Oregon State College. Extension Service8
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- Childs, Leroy, 1888 5
- Withycombe, Robert, 1880 5
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- Bullis, D. E. (Deloss Everett), 1894 19844
- Johnston, W. W. (William Waters), 1896 4
- Lovett, A. L. (Arthur Lester), 1885 19244
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- Wiegand, Ernest Herman, 1886 4
- Zeller, S. M. (Sanford Myron), 1885 19484
- Dean, H. K. (Harold Karl), 1889 3
- Harvey, Edward Maris, 18883
- Hyslop, G. R. (George Robert), 1884 3
- Oliver, A. W. (Alfred Weaver), 1894 3