George Hadley Books

Linear programming
Linear programming

By Hadley George

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Linear Programming (World Student)
Linear Programming (World Student)

By Michelle Dionetti, George Hadley

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On a cold winter day Eli and his dog go into the woods to catch a bear.

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Argal
Argal

By George Hadley

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Finite mathematics in business and economics
Introductory grammatical remarks on the Persian language, 1776.
Magic Circle
Magic Circle

By Gerry Dunne, George Hadley

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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.

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