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Incoming Resources
- 2019 guide to the night sky, Storm Dunlop and Wil Tirion ; Royal Observatory, Greenwich
- Stars & planets, the complete guide to the stars, constellations, and the solar system, Ian Ridpath & Wil Tirion
- Walk through the heavens, a guide to stars and constellations and their legends, Milton D. Heifetz, Wil Tirion
- Oxford atlas of the world, cartography by Philip's ; Gazetteer of Nations text, Keith Lye/Philip's ; star charts, Wil Tirion
- The National Audubon Society field guide to the night sky, Mark R. Chartrand ; astronomical charts by Wil Tirion