Ferdinand Opll Books

With the last volume of the ?Regesta Imperii under Frederick I? a project started in 1975 has come to its end. Thereby the whole existing sources concerning the period and the reign of Frederick Ba...

Die Transformation des Wiener Stadtbildes um 1700

By Ferdinand Opll

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Der Dessauer Gesandte Bernhard Georg Andermüller (1644?1717) zeichnete während seines vierjährigen Wienaufenthalts eine faszinierende Karte des frühneuzeitlichen Wien, vermutlich im Auftrag seiner...

Wien Im Mittelalter

By Ferdinand Opll, Peter Csendes

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Stadt Sehen

By Ferdinand Opll

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Wien Im Bild Historischer Karten

By Ferdinand Opll

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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.