Karl Heinz Paraquin Books

Eye teasers
Eye teasers

By Karl Heinz Paraquin

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Eye teasers
Eye teasers

By Charles H. Paraquin, Karl Heinz Paraquin

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Presents more than one hundred optical illusions, with explanations of the reasons for their effects.

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The world's best optical illusions
The world's best optical illusions

By Charles H. Paraquin, Karl Heinz Paraquin

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A collection of over 100 optical illusion puzzles, with explanations of the reasons for their effects.

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Maranas y Otras Manas
Maranas y Otras Manas

By Karl H. Paraquin

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Paras freche fragen
Paras freche fragen

By

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Eye teasers
Eye teasers

By Karl Heinz Paraquin

Average: 0.00, 0 Ratings

Presents more than one hundred optical illusions, with explanations of the reasons for their effects.

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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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