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Main contributor
- National Educational Television40
- Encyclopaedia Britannica Films7
- See Other Contributors6
- Federal Security Agency (Producer)3
- Unknown3
- Beryl Denman Lacey2
- David Prowitt2
- Delta Films2
- Division of Visual Aids, U.S. Office of Education (Producer)2
- E. H. C. Hildebrandt2
- Emerson Yorke Studio (Producer)2
- Encyclopaedia Britannica Films Inc.2
- Erpi Classroom Films, inc.2
- Evelyn P. Anderson2
- Federal Security Agency2
- Frank Wells2
- Indiana University Audio-Visual Center2
- Larry Yust2
- Louis Dahl2
- Robert Pruitt2