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| Publisher |
DC |
| Writer |
Gardner Fox |
| Penciler |
Carmine Infantino |
| Penciler |
Howard Sherman |
| Inker |
Howard Sherman |
| Inker |
Bernard Sachs |
| Inker |
Joe Giella |
| Cover Artist |
Joe Giella |
| Letterer |
Milt Snapinn |
| Letterer |
Gaspar Saladino |
| Cover Artist |
Gil Kane |
| Published | April 1959 |
"Challenger of the Phantom Chief", "Envelope of Doom", "Mask of Mystery".
