Martha Campbell Books

Now I lay me down to sleep

By Martha Campbell

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New Investigations of Marx's Method

By Fred Moseley, Martha Campbell

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New Investigations of Marx's Method is concerned with the philosophical principles that underlie Marx's economic theory in Capital, a subject which is essential to an understanding of Capital, but...

Culmination of Capital

By M. Campbell, G. Reuten

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Culmination of Capital

By Geert Reuten, Martha Campbell

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PLC at Work TM Cartoon Book

By Martha F Campbell

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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.