Lajos Berkes Books

Christians and Muslims in early Islamic Egypt

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This volume collects studies exploring the relationship of Christians and Muslims in everyday life in Early Islamic Egypt (642-10th c.) focusing mainly, but not exclusively on administrative and so...

Dorfverwaltung und Dorfgemeinschaft in Agypten von Diokletian zu den Abbasiden

By Lajos Berkes

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Hiermit wird das erste Mal eine systematische Analyse der Dorfverwaltung und der Struktur der Dorfgemeinschaft im spätantiken Ägypten (4.-8. Jahrhundert n.Chr.) vorgelegt, deren Basis mehrere Tause...

Griechische Papyri aus der Sammlung des Louvre P. Louvre III

By Lajos Berkes, Andrea Jordens

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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.