- American Terra Cotta Company (400)
- French, Wiiliam A. (99)
- Johnston, C. H. (44)
- Harlem Branch YMCA (20)
- Geological Survey of Minnesota (10)
- Bell Museum of Natural History (9)
- Geological Survey (U.S.) (7)
- YMCA of the USA (7)
- Jaques, Francis Lee, 1887-1969 (6)
- Eckener, Hugo (5)
- Canada. Natural Resources Intelligence Service (3)
- Neubauer, Loren Wenzel (1904-1991) (3)
- Steele, Frederic Dorr, 1873-1944 (3)
- Brockman family (2)
- Canada. Department of the Interior (2)
- Carlson, Adele Besser (2)
- Dworshak, Louis F., 1877-1963 (2)
- Holland, Rupert Sargent, 1878-1952 (2)
- International Joint Commission (2)
- Minnesota. Department of Highways. (2)
