Martha Keltz Books

A trilogy
A trilogy

By Martha Keltz

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A Maya trilogy
A Maya trilogy

By Martha Keltz

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A twentieth century trilogy
A twentieth century trilogy

By Martha Keltz

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Three unusual scientists
Three unusual scientists

By Martha Keltz

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Guirnalda
Guirnalda

By Martha Keltz, Celeste Mayorga

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Garland
Garland

By Martha Keltz

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Southwest journey
Southwest journey

By Martha Keltz

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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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