John Bruhn Books

The group effect
The group effect

By Bruhn John G.

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The Group Effect
The Group Effect

By John Bruhn

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The Power of Clan
The Power of Clan

By John Bruhn, Stewart Wolf

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The Power of Clan
The Power of Clan

By John Bruhn, Stewart Wolf

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Growing North
Growing North

By Jim Julison, John Bruhn

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Growing North
Growing North

By Jim Julison, John Bruhn

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AP Physics 2
AP Physics 2

By John Bruhn, Christopher Bruhn

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Group Effect
Group Effect

By John Bruhn

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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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