The Grand Trench was a network of canyons on Gall.
- Shadows of the Empire Sourcebook
- "A Guide to the Vehicles in Shadows of the Empire"—Star Wars Galaxy Magazine 9 (Picture only)
- "Game Room: LucasArts' Elder Statesman"—Star Wars Galaxy Magazine 9 (Picture only)
- "Star News"—Star Wars Insider 31 (Picture only)
- Star Wars: Shadows of the Empire Limited Collector's Edition
- Star Wars: The Art of the Brothers Hildebrandt