Ludger Udolph Books

"Nach der Befreiung von der osmanischen Herrschaft im Jahr 1878 durchlief Bulgarien nationale 'Wiedergeburt' sowie gesellschaftliche Modernisierung und Europäisierung im Zeitraffer. Der vorliegende...

Die Bulgarische Literatur der Moderne Im Europaeischen Kontext. Zwischen Emanzipation und Selbststigmatisierung

By Henrike Schmidt, Ludger Udolph, Bisera Dakova, Galin Tihanov

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Bulletin der Deutschen Slavistik. Jahrgang 19 2013

By Sebastian Kempgen, Ludger Udolph

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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.