Kathleen J. Frydl Books

The GI Bill

By Kathleen Frydl

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The drug wars in America, 1940-1973

By Kathleen Frydl

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"The Drug Wars in America, 1940-1973 argues that the US government has clung to its militant drug war, despite its obvious failures, because effective control of illicit traffic and consumption wer...

Drug Wars in America 1940 1973

By Kathleen J. Frydl

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The drug wars in America 1940 1973

By Kathleen Frydl

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Drug Wars in America 1940 1973

By Kathleen J. Frydl

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G. I. Bill

By Kathleen J. Frydl

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Drug Wars in America 1940 1973

By Kathleen J. Frydl

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Drug Wars in America 1940 1973

By Kathleen J. Frydl

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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.