- Photographic Laboratory (36)
- University of Minnesota Photographic Laboratory (26)
- Poole, Lynn (25)
- University of Minnesota (25)
- Moran, Kenneth J. (10)
- YMCA of the USA (7)
- Elliott, Richard Maurice, 1887-1969 (6)
- Bureau for Intercultural Education (4)
- Gerisch, Peter (4)
- Short, Lloyd Milton, 1897-1981 (4)
- Lansdale, Herbert Parker, Jr., 1898-1988 (3)
- National Federation of Settlements and Neighborhood Centers (3)
- University of Minnesota, Duluth, Photographic Lab (3)
- YMCA of the USA. International Division. (3)
- A.V.E.S. Photographic Laboratories (2)
- Arneman, H.F. (2)
- Farnham, R.S. (2)
- Fine Art Studios, Salem, Mass. (2)
- Gallagher's Studio (2)
- Geological Survey of Minnesota (2)
