Naila Bokari <br/><br/>
Piece of Pi  Wit-Sharpening, Brain-Bruising, Number-Crunching Activities With Pi (Grades 6-8) 

 -  Taylor and Francis  2005 
<br/><br/><label>ISBN: </label>9781003423539 
<br/><br/><label>Source: </label>EBOOK