| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| 1958 |
|
Starman's Quest | Gnome Press | Novel | |
| 1960 | Obsesión Espacial | E.D.H.A.S.A. | Novel | 7 | |
| February 1960 |
|
Sternenfahrer unerwünscht | Pabel | Novel | 3 |
| January 1962 |
|
Urania #273 | Mondadori | MAGAZINE | 3 |
| November 1969 |
|
Starman's Quest | Meredith Press | Novel | |
| June 1971 |
|
Die Sterne rücken näher | Heyne | Novel | |
| September 1971 |
|
Urania #575 | Mondadori | MAGAZINE | |
| June 1980 |
|
Le due facce del tempo | Mondadori | Novel | |
| April 1982 |
|
Au temps pour l'espace | Fleuve Noir | Novel | |
| 1984 |
|
Au temps pour l'espace | Edito-Service | Novel | 5 |
| November 1984 |
|
Chroniken der Zukunft Band 1 | Heyne | Omnibus | 7 |
| 1990 |
|
Unheimliche Begegnung der dritten Art / Die Sterne rücken näher | Das Beste | Omnibus | 179 |
| December 2008 | Starman's Quest | Project Gutenberg | Novel | ||
| February 2009 |
|
Starman's Quest | Aegypan | Novel | |
| June 2009 |
|
Starman's Quest | LibriVox | Novel | |
| October 2010 |
|
Starman's Quest | Halcyon Press | Novel | |
| September 2011 |
|
Starman's Quest | Gateway / Orion | Novel | |
| April 2013 |
|
Classic Martian Stories, Vol. 5 | CreateSpace | Anthology | 441 |
| June 2013 |
|
Starman's Quest | CreateSpace | Novel | |
| August 2013 |
|
The Seventh Science Fiction Megapack | Wildside Press | Anthology | |585 |
| December 2013 |
|
Starman's Quest | Spoken Realms | Novel |