Petra Kunze Books

Die schonsten Rituale fur Kinder.

By Petra Kunze, Catharina Salamander

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Die schonsten Rituale fur Kinder GU Ratgeber Kinder

By Petra Kunze

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Apprendre a dormir

By Petra Kunze

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Les problèmes de sommeil chez les petits sont angoissants pour les parents. Pourtant, ces derniers peuvent aider leur enfant à trouver son propre rythme.

Kinder fordern im Alltag.

By Petra Kunze, Catharina Salamander

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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.