| Book Title |
Justice League of America |
| Issue Number: |
20 |
| Published: |
June 1963 |
| Cover Artists: |
N/A |
| Writer: |
Gardner Fox |
| Pencils: |
Mike Sekowsky |
| Inker: |
Bernard Sachs |
| Letterer: |
Gaspar Saladino |
| Colourist: |
N/A |
| Editor: |
N/A |
| Story Title: |
The Mystery of Spaceman X! |
|
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