Posamentier, A.S & Lehmann, I <br/><br/>
Pi  a biography of the world`s most mysterious number 
A.S. Posamentier & I. Lehmann 
 - Hyderabad  Universities Press  2007 
 - 324 
<br/><br/> Afterword by Dr. Herbert A Hauptman nobel laureate 
<br/><br/><label>ISBN: </label>9788173715617