Holly Cefrey Books

Hallucinogens and Your Neurons

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Describes how this treaty, also known as the Treaty of San Lorenzo, came to be signed in 1795 by the United States and Spain, and how the agreement allowed America to grow westward and to avoid war...

The United States Constitution and Early State Constitutions

By Holly Cefrey

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Coping with Cancer Coping Library

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Exploring Australia

By Holly Cefrey

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Syphilis and Other Sexually Transmitted Diseases Epidemics

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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.