1. Gazetteer of planetary nomenclature Publication/Creation: Flagstaff, Ariz. : U.S. Geological Survey, [1999?]- Format: Journal, Newspaper or Serial Access & Availability: Loading
2. Global Navigation Satellite Systems : From Stellar to Satellite Navigation Author/Creator: H Mohamed, Ahmed Publication/Creation: Rijeka, Croatia : InTech, 2013 Format: Book Access & Availability: Loading