Robert Hirschfeld Books

Handbook of Bipolar Disorder
Handbook of Bipolar Disorder

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The kids' science book
The kids' science book

By Robert Hirschfeld

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Suggests experiments involving such aspects of nature as light, trees, and water.

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Attack of the living mask
Attack of the living mask

By Robert Hirschfeld

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The reader controls the action in this story about several young people who go looking for a missing friend on Halloween night.

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The kids' science book
The kids' science book

By Robert Hirschfeld

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They dared to dream
They dared to dream

By Robert Hirschfeld

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Meet three famous Americans who helped make the world a better place to live. Do you ever dream that the world could be a better place? Eleanor Roosevelt, Dr. martin Luther King, Jr. and Cesar Chav...

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What is a capital
What is a capital

By Robert Hirschfeld

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Read about three capitals - Tokyo, Mexico City, and Washington, D.C. - and see how they are different and alike.

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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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