Books by Grego, Peter
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Venus and Mercury, and How to Observe Them (Astronomers' Observing Guides)
Author(s): Grego, Peter
ISBN-13: 9780387742861
Astronomical Cybersketching: Observational Drawing with PDAs and Tablet PCs (The Patrick Moore Practical Astronomy Series)
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Collision Earth!: The Threat from Outer Space : Meteorite and Comet Impacts
Author(s): Grego, Peter
ISBN-13: 9780713727425