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| Publisher |
DC |
| Writer |
Cary Bates |
| Penciler |
Curt Swan |
| Inker |
Frank Chiaramonte |
| Inker |
Joe Staton |
| Colorist |
Adrienne Roy |
| Letterer |
Ben Oda |
| Cover Artist |
Dick Giordano |
| Cover Artist |
Ross Andru |
| Published | December 1980 |
Cover pencils by Ross Andru, inks by Dick Giordano. Twice Upon a Time!, script by Cary Bates, pencils by Curt Swan, inks by Frank Chiaramonte; Superman helps re-unite two time travellers who crashed on Earth; Mr. Alpha gets a hold of some technology from these time travelers and causes trouble. The Debut of Superman III, script by Cary Bates, pencils by Curt Swan, inks by Joe Staton; Story of Superman 2020's first adventure.
