Jeff Hammond Books

Real Men Work in the Pits
Real Men Work in the Pits
Handbook of the Hitler Jugend
Handbook of the Hitler Jugend

By Wilhelm P. B. R. Saris

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The author presents an in-depth development of Hitler-Jugend Gebiet triangles, shoulder straps, uniforms and their colors, and the ranking systems. Since the 1960s, Bann lists have been available i...

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Doctrine of Man and the Art of War
Conflict of Intent
Conflict of Intent

By Jeff Hammond

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High Performance Computing

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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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