Opal Dunn Books

Little Boat
Little Boat

By Opal Dunn, DUNN, Opal

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Un, Deux, Trois
Un, Deux, Trois

By Opal Dunn

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Un Deux Trois
Un Deux Trois

By Opal Dunn, Patrice Aggs

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UN Deux Trois: My First French Rhymes
UN Deux Trois: My First French Rhymes

By Opal Dunn

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An Illustrated Collection Of Twenty-five Traditional French Nursery Rhymes Including A Section Explaining Some Common Phrases And Giving Background Information On The Rhymes And How To Use Them In...

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Un, Deux, Trois: My First French Rhymes
Un, Deux, Trois: My First French Rhymes
Un, Deux, Trois: My First French Rhymes

By Opal Dunn

Average: 0.00, 0 Ratings

An Illustrated Collection Of Twenty-five Traditional French Nursery Rhymes Including A Section Explaining Some Common Phrases And Giving Background Information On The Rhymes And How To Use Them In...

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Un, Deux, Trois
Un, Deux, Trois

By Opal Dunn

Average: 0.00, 0 Ratings

An illustrated collection of twenty-five traditional French nursery rhymes including a section explaining some common phrases and giving background information on the rhymes and how to use them in...

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Un, Deux, Trois
Un, Deux, Trois

By Opal Dunn, Patrice Aggs

Average: 0.00, 0 Ratings

An Illustrated Collection Of Twenty-five Traditional French Nursery Rhymes Including A Section Explaining Some Common Phrases And Giving Background Information On The Rhymes And How To Use Them In...

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Un Deux Trois: First French Rhymes
Lapin 040396
Lapin 040396

By Opal Dunn

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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.

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