Cast & crew
How the Telephone Works (1938)
Directed by J.D. Chambers, Ralph Elton
Crew
| Fred Gamage | Cinematography |
| J.D. Chambers | Director |
| Ralph Elton | Director |
| Fred Gamage | Cinematography |
| J.D. Chambers | Director |
| Ralph Elton | Director |
How the Telephone Works (1938)
Directed by J.D. Chambers, Ralph Elton
| Fred Gamage | Cinematography |
| J.D. Chambers | Director |
| Ralph Elton | Director |
| Fred Gamage | Cinematography |
| J.D. Chambers | Director |
| Ralph Elton | Director |