- American Terra Cotta Company (739)
- Cooper, William Skinner, 1884-1978 (65)
- Bell Museum of Natural History (52)
- French, Wiiliam A. (25)
- United States. Bureau of Public Roads (24)
- Chicago Architectural Photographing Company (Photographer) (13)
- Geological Survey of Minnesota (10)
- Geological Survey (U.S.) (9)
- Murdoch Photographing Company (Photographer) (7)
- YMCA of the USA (6)
- YMCA of the USA. International Division. (5)
- Steele, Frederic Dorr, 1873-1944 (4)
- United States. General Land Office (4)
- Cliff Studio, Duluth, Minn. (3)
- Kaufman and Fabry (Photographer) (3)
- C.S. Hammond & Company (2)
- Canada. Natural Resources Intelligence Service (2)
- Johnston, C. H. (2)
- Johnston, Clarence H. (1859-1936) (2)
- Langwith Publishing Company (Minneapolis, Minn.) (2)