Challenge of the Unknown
Ace Magazines [1940s-1950s] · 1950-1950 · 1 issues · issue files for this publisher are coming; the series record is complete
Ace Magazines [1940s-1950s] · 1950-1950 · 1 issues · issue files for this publisher are coming; the series record is complete
| Issue | Key date | On record |
|---|---|---|
| #6 | 1950-09-00 |