David Jefferis Books

Super Subs
Super Subs

By David Jefferis

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Dreams of Space
Dreams of Space

By David Jefferis

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The first flyers
The first flyers

By David Jefferis

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The history of man's desire to fly and descriptions of early flights and aircraft.

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Jets
Jets

By David Jefferis

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Star Spotters
Star Spotters

By David Jefferis

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Ice Dwarfs
Ice Dwarfs

By David Jefferis

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Sun
Sun

By David Jefferis

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Sun
Sun

By David Jefferis

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Galaxies
Galaxies

By David Jefferis

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Related Articles from our Blog

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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