John L. Bull Books

Birds of New York State
Birds of New York State

By John L. Bull

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The Audubon Society Field Guide To North American Birds: Eastern Region
The Audubon Society Field Guide To North American Birds: Eastern Region

By John Bull, John L. Bull, John Farrand Jr.

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A simple and enjoyable book to aid in the identification of eastern species of birds.

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National Audubon Society Field Guide to North American Birds--E
National Audubon Society Field Guide to North American Birds--E

By National Audubon Society, John L. Bull

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Virtually every bird found in eastern North America is brought to life in this portable guide, an essential companion in the field and a staple in any birdwatcher's library—a birding bib...

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The easy bird guide.
The easy bird guide.

By John L. Bull

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Birds of New York State
Birds of New York State

By John L. Bull

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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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