Directed by
| Hamilton Luske | ... | (as Hamilton S. Luske) |
Writing Credits
| Bill Berg | ... | (story) |
Cast
 |
Bill Cole | ... | (voice) (as The Mellomen) |
|
|
Bill Lee | ... | (voice) (as The Mellomen) |
|
|
Thurl Ravenscroft | ... | Spirit of Progress, Senior (voice) (as The Mellomen) |
|
|
Max Smith | ... | Spirit of Progress, Junior (voice) (as The Mellomen) |
| Clarence Nash | ... | Donald Duck (voice) (uncredited) | |
Produced by
| Walt Disney | ... | producer (uncredited) |
Music by
| Buddy Baker | ||
Second Unit Director or Assistant Director
| Jim Swain | ... | assistant director (uncredited) |
Art Department
| McLaren Stewart | ... | art stylist |
| Xavier Atencio | ... | art stylist (uncredited) |
Special Effects by
| Eustace Lycett | ... | special effects |
Visual Effects by
| Joshua Meador | ... | effects animator |
Animation Department
| Les Clark | ... | animator |
| Don Griffith | ... | layout artist |
| Hal King | ... | animator |
| Fred Kopietz | ... | animator |
| Art Riley | ... | color stylist |
| Saul Bass | ... | layout artist (uncredited) |
| John L. Jensen | ... | background artist (uncredited) |
| Alan Maley | ... | background artist (uncredited) |
| Cliff Nordberg | ... | animator (uncredited) |
| Doris Plough | ... | assistant animator (uncredited) |
Music Department
| The Mellowmen Quartet | ... | musician (as The Mellomen) |
