Geary Books

Exercises in Mathematical Economics and Econometrics
Ego
Ego

By Tim Geary

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The Worldcrafters Worldcrafters
Strange toys.
Strange toys.

By Patricia Geary

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Civilization in the West Civilization in the West
Social History Western Europe
Social History Western Europe

By Geary

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350 Best Salads and Dressings
Using a map and compass
Using a map and compass

By Don Geary

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Guide to safe exploration of the wilderness, with instructions for using a compass, reading maps, planning an outing, navagating in the field, and understanding the weather.

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Step in the right direction
Step in the right direction

By Don Geary

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How to design & build your own workspace--with plans

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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.

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