Gerald E. Frug Books

Local Government Law, Cases and Materials

By Gerald E. Frug

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1991 Supplement to Local Government Law

By Gerald E. Frug

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City Making

By Gerald E. Frug

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City Making

By Gerald E. Frug

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"American metropolitan areas today are divided into neighborhoods of privilege and poverty, often along lines of ethnicity and race. As Gerald Frug shows, this divided and inhospitable urban landsc...

City Bound

By David J. Barron, Gerald E. Frug

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Women the Law

By Gerald E. Frug

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1997 Supplement to Women and the Law

By Gerald E. Frug, Dorothy E. Roberts, Judith G. Greenberg

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City Bound

By David J. Barron, Gerald E. Frug

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City bound

By Gerald E. Frug

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City Making

By Gerald E. Frug

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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.