Mark R. Chartrand Books

Night Sky
Night Sky

By Mark R. Chartrand, Mark Chartrand

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Planets
Planets

By Mark R. Chartrand

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Presents general information about the planets and other bodies in the solar system with suggestions for observation.

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Planets
Planets

By Mark R. Chartrand

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Exploring Space
Exploring Space

By Mark R. Chartrand

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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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