- Huff, Ned L., 1876-1964 (50)
- Bell Museum of Natural History (20)
- Geological Survey of Minnesota (10)
- Signature unclear (9)
- YMCA of the USA (9)
- Albrecht, Felice (5)
- Jaques, Francis Lee, 1887-1969 (5)
- Kobler, Max (4)
- YMCA of the USA. International Division. (4)
- Torres Studios, New York (3)
- Wahl, H. B. (3)
- velox (3)
- Child Study Association of America (2)
- Grob, Fritz (2)
- Herrler (2)
- Hughes, Langston (2)
- Kampmann, Karoly, 1902-1945 (2)
- Lundie, Edwin H. (2)
- Morganti Studio, 932 - 15th St., Denver, Colo. (2)
- Muller, Willi, 1890-1966 (2)
