Gary Klopfenstein Books

Trading Currency Cross Rates: Proven Trading Strategies from a Leading International Currency Trader and a Noted Expert on Futures and Options

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The Wiley Trader's Advantage Series is a new series of concise, highly focused books designed to keep savvy futures, options, stocks, bonds, and commodities traders abreast of the latest, successfu...

Strategic Trading in the Foreign Exchange Markets

By Gary Klopfenstein

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FX : managing global currency risk

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FX

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Stability and Stable Oscillations in Discrete Time Systems

By Vladimir Rasvan, Fuki, James E. Duffy, Tonkov, Klopfenstein, Aristide Halanay, Gary Klopfenstein

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Relatable God

By Gary Klopfenstein

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FX

By Gary Klopfenstein

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FX

By Gary Klopfenstein

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FX

By Gary Klopfenstein

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FX

By Gary Klopfenstein

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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.