Joaquin Roy Books

Lecturas de prensa

By Joaquin Roy

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The A to Z of the European Union

By Joaquin Roy

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Cuba the United States and the Helms Burton Doctrine

By Joaquin Roy

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"Offering the first full-length analysis of the Helms-Burton law, Joaquin Roy presents a review of the background, evolution, and international consequences of this controversial legislation, enact...

El gobierno y los presidentes de los Estados Unidos de America

By Joaquin Roy

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An introduction, in Spanish, to federal, state, and local governments, the presidency, and the presidents of the United States.

The streets of Coral Gables

By Joaquin Roy

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Camilo Jose Cela

By Joaquin Roy, Bertrand Demunoz

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European perceptions of Plan Colombia

By Joaquin Roy

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Lisbon fado

By Joaquin Roy, Christopher J. Bickerton

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Cuba y Espana

By Joaquin Roy

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ALA

By Joaquin Roy

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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.