Creative Commons Material

This book is published under a Creative Commons Attribution-NonCommercial 4.0 International Licence (CC BY-NC).
You are allowed and encouraged to freely copy this book. You can photocopy, print and distribute it as often as you like. You may download it onto any electronic device, distribute it via email, and upload it to your website, at no charge. You may also adapt the text and illustrations, provided you acknowledge the copyright holders (“attribute the original work”).
Restrictions: You may not make copies of this book for a profit-seeking purpose.
This holds for printed, electronic and web-based copies of this book, and any part of this book.

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