Gunnar Heinsohn Books

Ratsel Geld: Annaherungen aus okonomischer, soziologischer und historischer Sicht
Die Sumerer gab es nicht
Die Sumerer gab es nicht

By Gunnar Heinsohn

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Wann lebten die Pharaonen?
Zonen grijpen de wereldmacht
Zonen grijpen de wereldmacht

By Gunnar Heinsohn

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Onderzoek naar de demografische achtergronden van wereldwijd terrorisme, met name het bevolkingsoverschot aan jonge mannen.

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Ownership economics
Ownership economics

By Gunnar Heinsohn

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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.

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