Udo Schaefer Books

Making the Crooked Straight

By Udo Schaefer, Nicola Towfigh, Ulrich Gollmer

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CONTENTS FOREWORD, by J.A. McLean xiii PREFACE TO THE GERMAN EDITION (1995) xxi PREFACE TO THE ENGLISH EDITION (2000) xxiii INTRODUCTION 1 PART I: METHODOLOGY CHAPTER 1 OVERVIEW 15 I...

The Baha'i faith, sect or religion?

By Udo Schaefer

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Airliners in Colour

By Udo Schaefer, Mach III Plus

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L' histoire du salut et changement de paradigme

By Udo Schaefer

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Elektrotechnik. Allgemeine Grundbildung

By Udo Schaefer, Franz Josef Lintermann

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Glaubenswelt Islam. Eine Einfuhrung.

By Udo Schaefer

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Basiswissen IT Berufe EURO Einfache IT Systeme

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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.