Polly M. Robertus Books

The Dog Who Had Kittens

By Polly M. Robertus

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The richest doll in the world

By Polly M. Robertus

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The Christmas after her parents' death, Emily wants no gift but to see the wonderful doll of her grandmother's employer, Mrs. Bigley, but the old woman, who has also experienced a terrible loss, wi...

The Dog Who Had Kittens Live Oak Readalong

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The Dog Who Had Kittens Live Oak Readalong

By Polly Robertus

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Dog Who Had Kittens

By Polly Robertus

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Dog Who Had Kittens

By Jerry Terheyden, Polly M. Robertus

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Dog Who Had Kittens

By Jerry Terheyden, Polly M. Robertus

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Dog who had kittens

By Polly M. Robertus

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Dog who had kittens

By Polly M. Robertus

Average: 0.00, 0 Ratings

The Dog Who Had Kittens

Average: 0.00, 0 Ratings

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.