Ingrid Mader Books

Mauern um Wien. Die Stadtbefestigung von 1529 bis 1857

By Ingrid Mader, Christine Ranseder, Sylvia Sakl Oberthaler, Ingeborg Gaisbauer, Gerhard Reichhalter, Heike Krause

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Die Residenzstadt Wien an der Donau

By Sabine Grupe, Michael Grabner, Ingeborg Gaisbauer, Werner Chmelar, Sigrid Czeika

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Der Wiener Linienwall

By Ingrid Mader

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From the contents:0Zur Geschichte des Wiener Linienwalls Vom Schutzbau zur Steuergrenze. 0Bau, Verlauf und Nutzung des Wiener Linienwalls Braucht Wien eine neue Befestigung?0Die Ausführung des Wien...

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.