Wil Tirion Books

Sky Atlas 2000.0 2nd Desk Laminated Version
Sky Atlas 2000.0 2nd Field Laminated Version
Firefly Planisphere Deluxe
Astro Pack
Astro Pack

By Robin Scagell

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2017 guide to the night sky
2017 guide to the night sky

By Storm Dunlop

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Fully updated to 2017, this is the ideal guide for beginning sky watchers. With monthly charts and other diagrams, it shows how the visible stars change from month to month and includes the many sk...

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The illustrated atlas of the universe
Concise encyclopedia of the universe
Concise encyclopedia of the universe

By Claudia Martin, Wil Tirion

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Hundreds of maps, diagrams, illustrations, and color photographs document our universe.

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Concise encyclopedia of the universe
Concise encyclopedia of the universe

By Claudia Martin, Wil Tirion

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Hundreds of maps, diagrams, illustrations, and color photographs document our universe.

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The Pocket Guide to Astronomy Natural History Pocket Guides
Chemistry Revise A2
Chemistry Revise A2

By Rob Ritchie

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If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.

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