| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1965 |
|
Planetary Agent X / Behold the Stars | Ace Books | Omnibus | 5|4 |
| July 1966 |
|
Behold the Stars | Mayflower-Dell | Novel | 7 |
| August 1967 |
|
Transit zu den Sternen | Moewig | Novel | 5 |
| December 1967 |
|
Urania #478 | Mondadori | MAGAZINE | 3 |
| December 1980 |
|
Urania #867 | Mondadori | MAGAZINE | 3 |
| January 1981 |
|
Transit zu den Sternen | Pabel-Moewig | Novel | 7 |
| September 2011 |
|
Behold the Stars | Gateway / Orion | Novel |