Martin Koopmann Books

Das schwierige Bundnis

By Martin Koopmann

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Neue Wege in ein neues Europa

By Martin Koopmann, Hans Stark, Joachim Schild

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Voici un point sur la construction européenne : si ce sont la France et l'Allemagne qui ont donné les impulsions décisives pour faire avancer la Communauté (l'Union) européenne, l'Europe a acquis d...

Les relations franco allemandes dans une Europe unifiee

By Martin Koopmann, Hans Stark, Joachim Schild

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Akten Zur Auswartigen Politik der Bundesrepublik Deutschland 1971

By Daniela Taschler, Martin Koopmann, Matthias Peter

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Akten Zur Auswartigen Politik der Bundesrepublik Deutschland 1952

By Joachim Wintzer, Martin Koopmann

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Akten Zur Auswartigen Politik der Bundesrepublik Deutschland 1952

By Joachim Wintzer, Martin Koopmann

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Die Konsenswerkstatt

By Julien Thorel, Claire Demesmay, Martin Koopmann

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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.