Paul A. Johnsgard Books

Swans
Swans

By Paul Johnsgard

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The North American Geese
The North American Geese

By Paul Johnsgard

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North American Swans
North American Swans

By Paul Johnsgard

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Pheasants of the World
Pheasants of the World

By Paul A. Johnsgard

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The Hummingbirds of North America, Second Edition
The Hummingbirds of North America, Second Edition

By Paul A. Johnsgard

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Swift and iridescent, hummingbirds are found only in the New World, and encompass an amazing variety of specializations. No other family of birds can lay claim to so many superlatives, including sm...

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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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