John O. Whitaker Books

National Audubon Society Field Guide to North American Mammals
National Audubon Society Field Guide to North American Mammals

By National Audubon Society, John O. Whitaker

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The most comprehensive field guide available to North American mammals--a must-have for any enthusiast's day pack or home library--from the go-to reference source for over 18 million nature lovers....

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Mammals of the Eastern United States
Mammals of the Eastern United States

By John O. Whitaker

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In Their Definitive Work on eastern mammals, John O. Whitaker, Jr., and William J. Hamilton, Jr., vividly convey their sheer delight at the variety and abundance of mammalian life. They have brough...

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Mammals of Indiana
Mammals of Indiana

By Whitaker John O. Jr.

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Mammals of Indiana
Mammals of Indiana

By John O. Whitaker

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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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