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What if you find some thing wrong or missing

You can just send email to barmeir at gmail.com to complain about it. You also can help solve the problem fill the omission. In either way, you should contact Potto so your complain can be heard and perhaps you can help solve it.

About Potto Project

Potto Project NFP is Non-Profit organization created by Dr. Genick Bar-Meir and friends to build open sourcesoftware and open content textbooks for college students.Over 1,000,000 (million) Potto Project books have been downloaded from 175 different countries since 1995.

Potto Project is under open content licenses, which means that you will always have the freedom to use it, make copies, and improve it. You are encouraged to make use of these freedoms and share the textbooks and program with your family and friends!

Copyright (C) 2010, 2009, 2008, 2007, 2006, 2005, 2004, 2003 Dr. Genick Bar-Meir.
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or later or Potto license.
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This material is Open Knowledge