- Cooper, William Skinner, 1884-1978 (145)
- Bell Museum of Natural History (92)
- Purcell, William Gray, 1880-1965 (49)
- Norton, John W., 1876-1934 (29)
- Hart-Kaiser Studios (14)
- YMCA of the USA (11)
- Louderback, Walt (7)
- Geological Survey of Minnesota (6)
- National Board of the Young Men's Christian Associations. Committee on Extension (6)
- Rolt-Wheeler, Francis, 1876-1960 (6)
- Chicago Architectural Photographing Company (Photographer) (5)
- D. M. Ferry & Co. (5)
- Geological Survey (U.S.) (5)
- Saint Paul (Minn.). Department of Public Works (5)
- United States. Forest Service (4)
- Christy, Howard Chandler, 1873-1952 (3)
- Holm & Olson (3)
- Mueller, J. Carl (3)
- Berry Seed Company (2)
- Flagg, James Montgomery, 1877-1960 (2)