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- Carte audioCitadels Under AttackAlex Raymond
- Carte audioThe Plague of SoundAlex Raymond
- Carte audioThe Witch Queen of MongoAlex Raymond
- Carte audioThe Time Trap of Ming XIIIAlex Raymond
- Carte audioForces from the FederationAlex Raymond
- Carte audioThe War of the CybernautsAlex Raymond
- Carte audioCitadels on EarthAlex Raymond
- Carte audioCrisis on Citadel IIAlex Raymond
- Carte audioMassacre in the 22nd CenturyAlex Raymond
- Carte audioWar of the CitadelsAlex Raymond
- Carte audioThe Space CircusAlex Raymond
- Carte audioSerie: Flash GordonAlex Raymond