David Helton Books

The Costs of Sprawl Revisited Report Transit Cooperative Research Program 39.

By Samuel Seskin, David Listokin, Anthony Downs, Terry Moore, Judy S. Davis, Naveed A. Shad, David Helton, Hilary Phillips, Michelle Gall

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Brain Games Kids

By Cihan Altay Jeff Cockrell Julie K. Cohen Melissa Conner Don Cook Mark Danna The Grabarchuk Family Shelly Hazard David Helton Helene Hovanec

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Brain Games for Kids

By Cihan Altay Jeff Cockrell Julie K. Cohen Melissa Conner Don Cook Mark Danna The Grabarchuk Family Shelly Hazard David Helton Helene Hovanec

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What s the Difference

By Thomas J. Baechle, David Helton

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A friend for dear dragon

By Margaret Hillert

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A boy and his pet dragon make friends with their new neighbors, a girl and her unicorn.

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.