Hugo Johannsen Books

Holbaek amt

By Marie Louise Jorgensen

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Holbaek amt

By Marie Louise Jorgensen

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Masters meanings models

By Ebbe Nyborg, Hugo Johannsen, Mogens Vedso, Michael Andersen

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Essays by Hugo Johannsen on the church of Frederiksborg Castle and protestant palace chapels, tomb sculpture for Denmark by Cornelis Floris and his followers, stone masons in Denmark during the rei...

Reframing The Danish Renaissance Proceedings Of The International Conference In Copenhagen 2006

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Vejle amt

By Niels Jorgen Poulsen, Ebbe Nyborg

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Kirkens huse

By Hugo Johannsen

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Kirkens bygning og brug

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Kirkens huse

By Hugo Johannsen

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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.