John T. Koch Books

The Gododdin of Aneirin
The Gododdin of Aneirin

By John T. Koch

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An Atlas for Celtic Studies
An Atlas for Celtic Studies

By John T. Koch

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Celtic Culture
Celtic Culture

By John T. Koch

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Tartessian 2
Tartessian 2

By John T. Koch

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Celtic Culture
Celtic Culture

By John T. Koch

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The Celts
The Celts

By Antone Minard, John T. Koch

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The Celts
The Celts

By Antone Minard, John T. Koch

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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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