Siegfried Woldhek Books

Literaire tekeningen

By Siegfried Woldhek

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Lekker waterverven

By Siegfried Woldhek

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Siegfried Woldhek

By Siegfried Woldhek

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Woldhek is geen cartoonist. Hij portretteert. Net daarom is hij zo uniek. Want hij vergroot niet uit, maar toont in zijn portretten de werkelijkheid. Hij tekent mensen zoals ze zijn. Dat maakt zijn...

333 Birds

By Peter Vos, Siegfried Woldhek, Ger Luijten, Jan Piet Filedt Kok

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Getekende schrijvers

By Siegfried Woldhek

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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.