John Jeffries Books

Justice Lewis F. Powell, Jr.

By John Calvin Jeffries

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Justice Lewis F. Powell:: A Biography

By John Jeffries, John Calvin Jeffries, John C. Jeffries

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A look at oneof the most important Supreme Court Justices since WWII & how the controversial decisions of his tenure, from abortion to the constitutionality of capital punishment, helped determine...

Minorities and the Labor Market

By Richard McGahey, Jeffries John

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Wartime America

By John W. Jeffries, John Jeffries

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Legal research and the law of the European Communities

By Liz Carpenter, John Jeffries

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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.