- Cooper, William Skinner, 1884-1978 (341)
- Alexander, Charles O., 18??-1921 (35)
- Bell Museum of Natural History (35)
- Geological Survey of Minnesota (11)
- Iannelli, Alfonso, 1888-1965 (8)
- Purcell, William Gray, 1880-1965 (8)
- Chicago Architectural Photographing Company (Photographer) (6)
- New York (N.Y.). Commission on Building Districts and Restrictions. (6)
- Stark Bro's Nurseries (6)
- Wagemans, M. (6)
- Dupriez (5)
- Farmers Nursery Co (5)
- Steele, Frederic Dorr, 1873-1944 (5)
- D. M. Ferry & Co. (4)
- Field's, Henry, Seed & Nursery Co. (4)
- Geological Survey (U.S.) (4)
- Gurney Seed and Nursery Co. (3)
- Hansi, 1873-1951 (3)
- Henry Fuermann and Sons (Photographer) (3)
- YMCA of the USA (3)