One source (Locus) give this as an expansion of "Sea-Kings of Mars", while others (Tuck, Clute & Nicholls) gives it as a variant title.
| Date | Publication | Publisher | Type | Page | |
|---|---|---|---|---|---|
| June 1949 |
|
Thrilling Wonder Stories, June 1949 | Standard Magazines, Inc. | MAGAZINE | 9 |
| December 1953 |
|
The Sword of Rhiannon / Conan the Conqueror | Ace Books | Omnibus | 5 |
| 1955 |
|
The Sword of Rhiannon | T. V. Boardman | Novel | |
| August 1956 |
|
I Romanzi di Urania #131 | Mondadori | MAGAZINE | 3 |
| 1957 |
|
La porte vers l'infini | Fleuve Noir | Novel | |
| January 1957 |
|
Das Vermächtnis der Marsgötter | Pabel | Novel | 5 |
| 1967 |
|
The Sword of Rhiannon | Ace Books | Novel | 3 |
| November 1973 |
|
La spada di Rhiannon | Libra Editrice | Novel | 11 |
| 1974 |
|
L'épée de Rhiannon | Marabout | Novel | 5 |
| August 1975 |
|
The Sword of Rhiannon | Ace Books | Novel | 5 |
| 1976 |
|
L'épée de Rhiannon | Marabout | Novel | |
| 1977 |
|
La spada di Rhiannon | Libra Editrice | Novel | 11 |
| 1978 |
|
Het zwaard van Rhiannon | Elmar | Novel | 5 |
| July 1978 |
|
Das Erbe der Marsgötter | Pabel | Novel | 10 |
| 1979 |
|
Rhiannons svärd | Kindberg | Novel | |
| June 1979 |
|
The Sword of Rhiannon | Gregg Press | Novel | 5 |
| November 1980 |
|
The Sword of Rhiannon | Ace Books | Novel | 5 |
| March 1981 |
|
Das Erbe der Marsgötter | Pabel | Novel | 10 |
| December 1988 |
|
L'épée de Rhiannon | Presses Pocket | Novel | |
| January 1990 |
|
Divide and Rule / The Sword of Rhiannon | Tor | Omnibus | |
| September 1995 |
|
Millemondi Autunno 1995 | Mondadori | Anthology | 7 |
| July 2005 |
|
Sea Kings of Mars | Gollancz / Orion | Collection | 224 |
| 2007 |
|
Rhiannonův meč a jiné příběhy | Albatros | Collection | |1 |
| May 2008 |
|
Le grand livre de Mars | Le Bélial' | Omnibus | 23 |
| June 2008 | Sea-Kings Of Mars | Baen Books | Novel | ||
| June 2008 | The Solar System | Baen Books | Omnibus | ||
| June 2009 |
|
The Sword of Rhiannon | Paizo Publishing | Novel | |
| 2012 |
|
The Sword of Rhiannon | Audible Frontiers | Novel |