- United States. Forest Service4
- Kellogg, Royal S.2
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- Dryden, James, 1863 1
- Jusserand, J. J. (Jean Jules), 1855 19321
- Lewis, C. I. (Claude Isaac), 1880 19241
- Oregon Agricultural College. Department Of College Extension1
- Oregon Agricultural College. Department Of Poultry Husbandry1
- Oregon Agricultural College. Experiment Station1
- Pierson, Albert H. (Albert Halsey), 1877 19481
- Price, Overton W. (Overton Westfeldt), 1873 19141
- Roosevelt, Theodore, 1858 19191
- Wilson, H. F. (Harley Frost), 1883 1
- Wilson, James, 1835 19201