Peter Kohlgraf Books

Die Ekklesiologie des Epheserbriefes in der Auslegung durch Johannes Chrysostomus: Eine Untersuchung zur Wirkungsgeschichte paulinischer Theologie

By Peter Kohlgraf

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Glaube im Gesprach

By Peter Kohlgraf

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Der Dom zu Worms Krone der Stadt

By Tobias Schafer, Felicitas Janson, Peter Kohlgraf

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Worms, Bischofssitz seit dem frühen Mittelalter, stieg als Grablege der frühen Salier und spätestens mit dem Neubau des Doms unter Bischof Burchard (1000-1025) zu einer bedeutenden Stätte des Reich...

Nur eine Dienende Kirche Dient der Welt

By Peter Kohlgraf

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Vergeben und Versohnen

By Peter Kohlgraf

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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.