Denes Harai Books

Gabriel Bethlen

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Parmi les princes de Transylvanie se distingue un homme dont le règne constitue, selon les contemporains et les historiens, l'âge d'or de la Transylvanie. Il s'agit de Gabriel Bethlen, prince de 16...

Pour le bien de l Etat et le repos du public

By Denes Harai

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Dictionnaire Richelieu

By Francoise Hildesheimer, Denes Harai

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Journal d un officier de Louis XIII sur le siege de Montauban 1621

By Denes Harai

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Les alter ego des souverains

By Alvaro Adot Lerga, Philippe Chareyre, Denes Harai

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Le pouvoir au fil de l eau

By Denes Harai

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Grands serviteurs de petits Etats

By Denes Harai

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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.