Rolf Dieter Muller Books

1945. Das Ende des Krieges

By Rolf Dieter Muller, Gerd R. Uebersch Ar, Gerd R. Ueberschar

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Der Zusammenbruch des Deutschen Reiches 1945

By Rolf Dieter Muller

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Die Beziehungen zwischen Krankenversicherung und Unfallversicherung

By Rolf Dieter Muller

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Enemy in the East

By Rolf Dieter Muller

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Operation Barbarossa, Hitler's invasion of the Soviet Union in 1941, led to one of the most brutal campaigns of World War II: of the estimated 70 million people who died in the war, over 30 million...

Militargeschichte

By Rolf Dieter Muller

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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.