Mary McCallum Books

The blue

By Mary McCallum

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Adaptation to loss through short-term group psychotherapy

By William E. Piper

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Interpretive and Supportive Psychotherapies

By Mary McCallum, Hassan F. A. Azim, Anthony S. Ph.D. Joyce, John S. Ogrodniczuk

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Dappled Annie and the Tigrish

By Mary McCallum

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"There are faces in the hedge at the end of the garden, and a nest of tiny fantails, and that's where 9-year-old Annie goes to play one hot summer while her father works up at the lighthouse. One a...

Dappled Annie and the Tigrish

By Mary McCallum

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Grecia

By Mary McCallum

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Grecja

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Greece

By Mary McCallum

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Psychological Mindedness

By Mary McCallum, William E. Piper

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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.