Astronomical Cybersketching : Observational Drawing with PDAs and Tablet PCs
Peter Grego
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Format: eBook (PDF)
The Star Book : An Introduction to Stargazing and the Solar System
Peter Grego
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Format: eBook (EPUB)
Blazing a Ghostly Trail : ISON and Great Comets of the Past and Future
Peter Grego
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Format: eBook (PDF)