Like Sherbet Sherbet itibaren Medon, TN 38356, Birleşik Devletler
bu ikinci kez okundu. Daha çok keyif aldım, ama yine de belirsiz.
GOOD
When I start reading this book( it's persian translation),I surprised of how clear Polya has explained SOLVING A PROBLEM.In this book you learn how to think when you want to solve problems.and I think it works all the time.after that you should improve your aknowledgment.