Jeff Hay Books

World History by Era Vol. 7 Europe Rules the World

By Jeff Hay

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The Greenhaven encyclopedia of the Vietnam War

By Jeff T. Hay, Jeff Hay

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An alphabetical presentation of definitions and descriptions of terms and events of the Vietnam War.

A History of the Third Reich Edition 1. History of the Third Reich

By Jeff Hay

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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.

Jeff Hay Books

Vol. 4 The Renaissance

World History by Era Vol. 7 Europe Rules the World

Vol. 7 Europe Rules the World

The Treaty of Versailles

The Treaty of Versailles

A history of the Third Reich

A history of the Third Reich

A history of the Third Reich

The Greenhaven encyclopedia of the Vietnam War

A History of the Third Reich Edition 1. History of the Third Reich

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

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