Johannes Koder Books

Nomos Georgikos

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"Der Nomos Georgikos ('Landwirtschaftsgesetz') ist auf dem Gebiet der Landnutzung die einzige eigenständige Regelung der Byzantiner mit gesetzesähnlichem Charakter. Er beeinflusste die Gesetzgebung...

Die Byzantiner und Europa

By Johannes Koder

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Space landscapes and settlements in Byzantium

By Johannes Koder

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To Vyzantio hos choros

By Johannes Koder

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Die Byzantiner und Europa

By Johannes Koder

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Die Byzantiner

By Johannes Koder

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Die Byzantiner

By Johannes Koder

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Frommen Byzantiner und Ihre Bosen Nachbarn

By Johannes Koder

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Byzantine war ideology between Roman imperial concept and Christian religion

By Johannes Koder, Ioannis Stouraitis

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"Holy war and just war are unfortunately not only keywords for recondite excursions into the past, but equally for problems of the present. This applies as well for the attempts of rulers to justif...

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.