| Electrons At Work. |
1961 |
Encyclopaedia Britannica Films Inc. |
|
16mm |
Color |
sound |
| Light and color |
1961 |
Encyclopaedia Britannica Educ Corp: Distributor | Encyclopaedia Britannica Educational Corporation | Indiana University Audio-Visual Center: Distributor |
0:13:03 |
16mm |
Color |
sound |
| Waves and energy |
1961 |
Encyclopaedia Britannica Films: Distributor | Indiana University Audio-Visual Center: Distributor |
0:10:34 |
16mm |
B&W |
sound |