Gerda Heydemann Books

Post Roman transitions

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Classical civilization (and hence contemporary Western culture) had deep roots in Afro-Asiatic cultures, but these influences have been systematically overlooked. This series of monographs and coll...

Post-Roman transitions

By Pohl Walter, Gerda Heydemann

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Historiography and Identity II

By Helmut Reimitz, Gerda Heydemann

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Strategies of Identification

By Gerda Heydemann, Walter Pohl

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"How were identities created in the early Middle Ages and when did they matter? This book explores different types of sources to understand the ways in which they contributed to making ethnic and r...

Cassiodors Psalmenkommentar

By Gerda Heydemann

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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.