# Before GPS: Determining Your Position Using Celestial Measurements: Th, Vol. 1

By **Roy Timpe**

- ISBN-13: 9781973508649
- Publisher: Independently published
- Format: Paperback
- Published: 2 Dec 2019

## About this book

Buy Before GPS: Determining Your Position Using Celestial Measurements: The How and Why of Celestial Navigation By Roy Timpe.  ISBN: 9781973508649. ISBN-10: 1973508648

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