| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1967 |
|
These Savage Futurians / The Double Invaders | Ace Books | Omnibus |
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1967 |
|
These Savage Futurians / The Double Invaders | Ace Books | Omnibus |