Louis Oppenheimer Books

The Self Concept

By Louis Oppenheimer

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How Children Understand War and Peace

By Daniel Bar Tal, Amiram Raviv, Louis Oppenheimer

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If we had a better grasp on how children and adolescents develop ideas of war, conflict, and peace, would it be possible to consciously influence these concepts toward more peaceful orientations? W...

The Self system

By Louis Oppenheimer, Annerieke Oosterwegel

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The Origins of Action

By Louis Oppenheimer

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The Self-concept

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The Origins of action

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National Identity and Ingroup Outgroup Attitudes in Children the Role of Socio Historical Settings

By Louis Oppenheimer, Martyn Barrett

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Self System

By Louis Oppenheimer, Annerieke Oosterwegel

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Self System

By Louis Oppenheimer, Annerieke Oosterwegel

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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.