Jonathan Alderfer Books

National Geographic complete birds of North America

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National Geographic Field Guide to Birds: The Carolinas

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National Geographic Field Guide to Birds provides affordable, portable, reliable region-specific information, perfect for the novice or experienced birder. In each guide, an introduction by an expe...

National Geographic Field Guide to Birds: Texas

By Jonathan Alderfer

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National Geographic complete birds of North America

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National Geographic Field Guide to Birds: Arizona and New Mexico

By Jonathan Alderfer

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Featuring as many as 175 birds apiece and nearly 300 photographs, illustrations and maps, this handy, informative book adds two Southwestern states to National Geographic's growing series of field...

National Geographic Field Guide to Birds: Washington and Oregon

By Jonathan Alderfer

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Featuring as many as 175 birds apiece and nearly 300 photographs, illustrations and maps, this handy, informative book adds two Pacific Northwestern states to National Geographic's growing series o...

National Geographic Field Guide to the Birds of North America Fifth Edition National Geographic Field Guide to the Birds of North America

By Jon L. Dunn, Jonathan Alderfer

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National Geographic Field Guide to Birds: Pennsylvania

By Jonathan Alderfer

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Designed to fit in a backpack or pocket for easy access, each of these handy and popular bird field guides comprises 272 pages and features about 175 birds organized by family as approved by the Am...

National Geographic Field Guide to Birds

By Jonathan Alderfer

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National Geographic Kids Bird Guide of North America, Second Edition

By Jonathan Alderfer

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Fly into the world of birds in the most complete guide for kids to North America's birds, featuring range maps, cool facts, fun activities, and detailed descriptions and drawings by Jonathan Alderf...

How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

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.