Cover:
![](https://www.opentextbooks.org.hk/system/files/export/11/11894/cover_page_html/cover_screen.png)
Description (book):
This selection and arrangement of content as a collection is copyrighted by John Petroff. It is licensed under the Creative Commons Attribution Non-Commercial-ShareAlike 4.0 license (http://creativecommons.org/licenses/by-nc-sa/4.0/).
PDF:
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