John Hellmann Books

American Myth and the Legacy of Vietnam

By John Hellmann

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American Myth and the Legacy of Vietnam

By John Hellmann

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The Kennedy obsession

By John Hellmann

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Not the history of a man's life but the biography of his idea, The Kennedy Obsession traces the creation of Kennedy's image as an inspired - and inspiring - fiction. The Kennedy Obsession reveals...

The Kennedy Obsession

By John Hellmann

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Fables of fact

By John Hellmann

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Kennedy Obsession

By John Hellmann

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American Myth and the Legacy of Vietnam

By John Hellmann

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Proceedings of the 1st International Congress on Ceramics

By Stephen W. Freiman, Kathryn Logan, Mrityunjay Singh, John Hellmann, Gary S. Fischman

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Global Roadmap for Ceramic and Glass Technology with CD ROM

By Costa Sideridis, Tom Coyle, Kathryn Logan, Linn Hobbs, Robert D. Cook, Jeff Smith, Marty Green, Mrityunjay Singh, John Hellmann, Gary S. Fischman

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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.