William Petersen Books

Malthus

By William Petersen

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Masonic Quiz

By William Petersen

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From Birth to Death

By William Petersen

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"A principal topic of this book is the relative accuracy of population statistics and the degree to which one should accept data as published. The main focus is on the United States and especially...

From Persons to People

By William Petersen

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"Problems associated with aggregation and classification are the underlying theme of this book. When data assembled from individuals are presented as group characteristics, this process has logical...

Malthus

By William Petersen

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Japanese Americans

By W. Peterson, William Petersen

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The one year book of Psalms

By William J. Petersen

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From Birth to Death

By William Petersen

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Ethnicity counts

By William Petersen

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Protein Therapie und Unspezifische Leistungssteigerung

By M.D. William F. 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.