Gerd Hardach Books

A Short History of Socialist Economic Thought

By Ben Fine, Gerd Hardach, Dieter Karras, Gerd Hardack

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A short history of socialist economic thought

By Gerd Hardach

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Der Deutsche Industrie und Handelskammertag 1861 2011

By Gerd Hardach

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The First World War, 1914-1918

By Gerd Hardach, Gerd H. Hardach

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Mathilde Scheinberger und Karl Hofer heirateten 1903. Sie hatten drei Söhne, von denen einer bereits im Kindesalter starb. In den 1920er Jahren nahm Karl, inzwischen ein prominenter Maler, eine Bez...

Reisebilder aus Hessen

By Gerd Hardach, Ulrich Eisenbach, Ute Mayer

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Der Erste Weltkrieg

By Gerd Hardach, Wolfram Fischer

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Der Marshall-Plan

By Gerd Hardach

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Der Generationenvertrag

By Gerd Hardach

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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.