Dagmar Hirschfelder Books

Unwirklichkeiten

By Dagmar Hirschfelder

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Tronies

By Dagmar Hirschfelder, Leon Krempel

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Frans Hals

By Katja Kleinert, Dagmar Hirschfelder

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Tronie und Portrat in der niederlandischen Malerei des 17. Jahrhunderts

By Dagmar Hirschfelder

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Unwirklichkeiten

By Hans Gunther Schwarz, Dagmar Hirschfelder, Frieder Hepp

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Das Symposium "Unwirklichkeiten. Zum Problem der Realität in der Moderne" war eine Begleitveranstaltung zur Ausstellung "Unwirklichkeiten. Das Imaginäre in der Kunst von Caspar David Friedrich bis...

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.