Johannes Divjak Books

Orbis Latinus je 2 Bde. Bd.7 Ovid

By Kurt Smolak, Christine Ratkowitsch, Johannes Divjak, Hubert Reitterer

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Das Kalenderhandbuch von 354 Der Chronograph des Filocalus Teil II

By Johannes Divjak

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The first coherent and handy edition with commentaries of one oft he most important sources for history, administration and religious mentalities of the city of Rome in the 4th century A.D.The coll...

Das Kalenderhandbuch von 354 Der Chronograph des Filocalus Teil1

By Johannes Divjak

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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.