| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1968 |
|
Doom of the Green Planet / Star Quest | Ace Books | Omnibus | 5|4 |
| March 1969 |
|
Urania #509 | Mondadori | MAGAZINE | 3 |
| December 1979 |
|
Urania #812 | Mondadori | MAGAZINE | 3 |