David Klein Books

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Suggestions for increasing one's income, saving money, buying by mail, dealing with warranties and guarantees, buying items by special purchase or below wholesale cost, and comparing prices.

Yourself ten years from now

By Klein David

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Advice for planning a career which includes getting to know oneself, money, education, attitudes, family influence, and coping with the system.

Die Schonheit sei Beute des Starken

By Klein David Musicologist

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Online RELATE Relationship Inventory with User's Manual

By Dean Busby, David Klein, Vicky L. Loyer Carlson, Jeffrey Larson, Thomas Holman

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Berlin

By David Klein, James S. Sutterlin

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Leonard Marshall

By Leonard Marshall

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Organic Chemistry 1 as a Second Language

By David R. Klein

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How Do You Know It s True

By David Klein, Marymae E. Klein

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How Do You Know It s True

By David Klein, Marymae E. Klein

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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.