Robert C. Petersen Books

Addictions: Issues And Answers

By Robert. Peterson, Robert C. Petersen, Ray Hodgson, Ray J. Hodgson, Jerome Jaffe

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"A Life cycle book." "First published in Holland 1980 by Multimedia Publications Inc." Includes bibliographical references (p. 123-125) and index

Building Drug-Free Schools

By American Council For Drug Education, Robert C. Petersen, Richard A. Hawley, Margaret C. Mason

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Childhood And Adolescent Drug Abuse: A Physician'S Guide To Office Practice

By Robert C. Petersen, Robert Petersen

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The Biological Importance Of Humic Material In Acidified Waters : A Su...

By Robert C. Petersen

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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.