Gerald D. McDonald Books

Films of Charlie Chaplin

By Gerald Mcdonald

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Films of Charlie Chaplin

By Annamaria MacDonald

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The complete films of Charlie Chaplin

By Gerald D. McDonald

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A checklist of American newspaper carrier's addresses, 1720-1820

By Gerald D. McDonald

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Los films de Charlie Chaplin

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Hacia el año 1914, un desconocido comediante de veinticinco años, llamado Charles Spencer Chaplin, entraba en el cine de la mano de los Estudios Keystone. En aquel momento, el que más tarde mere...

Films of Charlie Chaplin

By Gerald D. McDonald

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The complete films of Charlie Chaplin

By Gerald D. McDonald

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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.