Main contributor
- Brian Jackson4
- Clifford J. Kamen Productions4
- Clifton Fadiman4
- Douglas Campbell4
- Encyclopaedia Britannica Films, Inc.4
- Fred Lasse4
- Hermann I. Schlesinger4
- Howard W. Odum4
- I. Mankofsky4
- Tony Van Bridge4
- Unknown4
- William F. Deneen4
- A. J. Carlson3
- Abraham Morochnik3
- Charles L. White, Jr.3
- Educational Services Incorporated3
- Erpi Classroom Films, Inc.3
- Frank Meagher3
- H. Horton Sheldon3
- John C. Gibbs3