Michael Guillen Books

Dr. Universe tells U about ur body
Dr. Universe tells U about ur body

By Michael Guillen

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A book of questions, answers, fun facts, and experiments about the body by D. Universe, the ABC-TV science correspondent.

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Dr. Universe tells U about ur body
Dr. Universe tells U about ur body

By Michael Guillen

Average: 0.00, 0 Ratings

A book of questions, answers, fun facts, and experiments about the body by D. Universe, the ABC-TV science correspondent.

Read More
Dr. Universe 2 Glb
Dr. Universe 2 Glb

By Michael Guillen

Average: 0.00, 0 Ratings

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Dr. Universe 4
Dr. Universe 4

By Michael Guillen

Average: 0.00, 0 Ratings

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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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