J. Dunn Books

Destination Dark Ages Time Travel Series
Exit to the End of the World Time Travel Series
The Rest of Us Catholics
The Rest of Us Catholics

By Joseph Dunn, J. Dunn

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The H.E. Harris and Company, Inc. Postage Stamp Catalog, 1989
The H.E. Harris and Company, Inc. Postage Stamp Catalog, 1989

By H.E. Harris Co., J. Dunn

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Discusses where and how to obtain stamps; tools, accessories, catalogues, and albums; identification of stamps; and the history of stamps. Includes a dictionary of terms.

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Us Bna Postage Stamp Catalog
Us Bna Postage Stamp Catalog

By H E Harris

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David Coulthard The Flying Scotsman
Financial Reporting UK Standards
Cima Official Study System
La Video numerique
La Video numerique

By J. Dunn

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Inquietud y Bienestar Infantil
Inquietud y Bienestar Infantil

By Judy Dunn

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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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