Jan Klabbers Books

Treaty Conflict and the European Union

By Jan Klabbers

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Introduction to International Institutional Law

By Jan Klabbers

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Introduction to International Institutional Law

By Jan Klabbers

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Introduction to International Institutional Law

By Jan Klabbers

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International Law

By Jan Klabbers

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"Written by one of the world's leading international lawyers, this is a landmark publication in the teaching of international law. International law can be defined as 'the rules governing the legal...

International Law

By Jan Klabbers

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An introduction to international institutional law

By Jan Klabbers

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Research Handbook on the Law of International Organizations

By Jan Klabbers, Asa Wallendahl

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International Law

By Jan Klabbers

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International Law

By Jan Klabbers

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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.