Helmut Opletal Books

Die Informationspolitik der Volksrepublik China

By Helmut Opletal

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China

By Helmut Opletal

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Doi Moi

By Helmut Opletal, Werner Clement

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Die Kultur der Kulturrevolution

By Helmut Opletal

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Personenkult und politisches Design im China von Mao Zedong Alltagsobjekte und die vielfältigen Ausformungen der politischen Propaganda in der Zeit von 1966 bis 1976 werden Schwerpunkt dieser vom C...

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.