The Belasco system, a star system, existed within the Expansion Region of the galaxy.
- The Essential Atlas (Initial mention)
- Star Wars: The Essential Atlas Online Companion featured on StarWars.com (article) (alternative link)
- The Essential Guide to Warfare
- Star Wars: Edge of the Empire Core Rulebook
- Star Wars: Age of Rebellion Core Rulebook
- Star Wars: Force and Destiny Core Rulebook