- Lecornu, Joseph (132)
- Cooper, William Skinner, 1884-1978 (106)
- Bell Museum of Natural History (21)
- YMCA of the USA (12)
- Steele, Frederic Dorr, 1873-1944 (10)
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- Wiele & Klein, Photographers, Madras (5)
- University of Minnesota. Department of Botany. (4)
- American Bank Note Company (2)
- Augustana Evangelical Lutheran Church. (2)
- Barteldes Seeds (2)
- D. M. Ferry & Co. (2)
- Farmer Seed and Co. (2)
- George, Russell D., 1866- (2)
- Harrison Nursery Co. (2)
- Iowa Seed Co. (2)
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- Taylor, W. E. (2)