Nancy L. Segal Books

Entwined Lives: Twins and What They Tell Us About Human Behavior

By Nancy Segal, Nancy L. Segal

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Indivisible by Two

By Nancy L. Segal

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Indivisible by Two

By Nancy L. Segal

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Accidental brothers

By Nancy L. Segal

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Accidental Brothers tells the unique story of two sets of identical Colombian twin brothers who discovered at age 25 that they were mistakenly raised as fraternal twins--when they were not even bio...

Uniting Psychology and Biology

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Someone else s twin

By Nancy L. Segal

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Presents research from case studies in which identical twins were mistakenly switched and separated at birth and raised by families other than their birth families, discussing the psychological con...

Twin Mythconceptions

By Nancy L. Segal

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Twin Mythconceptions

By Nancy L. Segal

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Twin Research

By Adam D. Tarnoki, David L. Tarnoki, Nancy L. Segal, Jennifer Harris

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Twin Research

By Adam D. Tarnoki, David L. Tarnoki, Nancy L. Segal, Jennifer Harris, Levente Littvay

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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.