John Woodruff Books

China in Search of Its Future: Years of Great Reform, 1982-87

By John Woodruff, Woodruff John.

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Cambridge Astronomy Dictionary

By Ian Ridpath, John Woodruff

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Over 1000 clear and up-to-date entries, extensively cross-referenced. 50 diagrams and 30 tables. From aberration to zodiacal light, all the frequently used expressions are clearly defined. Brief bi...

Cambridge Astronomy Dictionary

By Ian Ridpath, John Woodruff

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Philip s Astronomy Dictionary Astronomy

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Philip s Star Finder Astronomy

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Southern Star Finder

By Wil Tirion, John Woodruff

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Philip s star finder astrobox

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Philip s astronomy dictionary

By John Woodruff

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Philip s star finder

By John Woodruff

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Jubilee songs of the Anglo-Saxon race

By John Woodruff

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

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.