Rudolf Koella Books

Mit dem Bild 'Le bain au soir d?été' überwindet Félix Vallotton (1865-1925) den tonigen Realismus seines Frühwerks und bekennt sich zum farbigen Synthetismus der Nabis-Phase. Thematisch schliesst e...

Uber Felix Vallotton

By Rudolf Koella

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Neue Sachlichkeit und Surrealismus in der Schweiz 19151940

By Editor Rudolf Koella

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Hans Bruhlmann 1878 1911

By Rudolf Koella

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Adolf Dietrich

By Rudolf Koella

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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.