William Seltzer Books

Innocent Questions

By Arnold Dreyblatt

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Age Misreporting and Age-Selective Underenumeration

By Douglas C. Ewbank, William Seltzer

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1. Introduction 2. Source of Age Misreporting 3. Methods for Detecting Errors in Reported Age Distributions 4. Typical Patterns of Distortion in Reported Age Distributions 5. The Effect of Erro...

Demographic data collection

By William Seltzer

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Use and Misuse of the United States Census

By Margo Anderson, William Seltzer

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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.