Gretchen Hoffmann Books

Mononucleosis
Mononucleosis

By Gretchen Hoffmann

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"Discusses mononucleosis and its effects on people and society"--Provided by publisher.

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The Flu Health Aleart
The Flu Health Aleart

By Gretchen Hoffmann

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Osteoporosis Health Alert
Osteoporosis Health Alert

By Gretchen Hoffmann, Gretchen Hoffman

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"Discusses osteoporosis and its effects on people and society"--Provided by publisher.

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Chickenpox
Chickenpox

By Gretchen Hoffmann

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Digestive system
Digestive system

By Gretchen Hoffmann

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"Discusses the parts that make up the human digestive system, what can go wrong, how to treat those illnesses and diseases, and how to stay healthy"--Provided by publisher.

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Iris in Violet
Iris in Violet

By Gretchen Hoffmann

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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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