- Cooper, William Skinner, 1884-1978 (139)
- Steele, Frederic Dorr, 1873-1944 (22)
- Salieti, Joaquim Coll (20)
- Bell Museum of Natural History (16)
- Geological Survey of Minnesota (16)
- YMCA of the USA (15)
- Chicago Architectural Photographing Company (Photographer) (9)
- Dworshak, Louis F., 1877-1963 (8)
- YMCA of the USA. International Division. (7)
- A. A. Berry Seed Co. (4)
- Field's, Henry, Seed & Nursery Co. (4)
- Geological Survey (U.S.) (4)
- Harris, Lawrence (4)
- Lundie, Edwin H. (4)
- Barteldes Seeds (3)
- Berry Seed Company (3)
- Bostwick, Louis R. (Photographer) (3)
- Henry Fuermann and Sons (Photographer) (3)
- Iowa Seed Co. (3)
- Larner, M. P. (Photographer) (3)