Kai Ruffing Books

Die berufliche Spezialisierung in Handel und Handwerk

By Kai Ruffing

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Weinbau im romischen Agypten

By Kai Ruffing, Janet Ruffing

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Die Wirtschaft des Romischen Reiches. 1. 3. Jahrhundert . Eine Einfuhrung.

By Kai Ruffing, Hans Joachim Drexhage, Heinrich Kronen

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Emas non quod opus est sed quod necesse est

By Kai Ruffing, Kerstin Dross Krupe, Hans Joachim Drexhage

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Herodots Quellen die Quellen Herodots

By Kai Ruffing, Kerstin Dross Krupe, Boris Dunsch

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At the Philipps-University of Marburg in 2011, a conference about the importance of German historian Detlev Fehling's "The references in Herodotus" (1971) was held. Fehling's understanding of Herod...

Antike Wirtschaft und ihre kulturelle Pragung

By Kai Ruffing, Sabine Follinger, Kerstin Dross Krupe

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Der vorliegende Band ist das Ergebnis einer internationalen Tagung, die im Februar 2014 an der Philipps-Universität Marburg stattfand. Er hat sich zum Ziel gesetzt, den Zusammenhang von Wirtschaft...

Antike als Modell in Nordamerika

By Ulrich Niggemann, Kai Ruffing

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Wirtschaft in der Griechisch Romischen Antike

By Kai Brodersen, Kai Ruffing

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Die Wirtschaft des Romischen Reiches

By Kai Ruffing, Heinrich Konen, Hans Joachim Drexhage

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Antike Als Modell in Nordamerika

By Ulrich Niggemann, Kai Ruffing

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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.