Engel, A <br/><br/>
Problem solving strategies 
A. Engel 
 - New Delhi  Springer (India) Pvt. Ltd  2005 
 - x  403 
 - Problem books in mathematics .
<br/><br/> SIE 
<br/><br/><label>ISBN: </label>81-8128-015-6 
<br/><br/><label>Dewey Class. No.: </label>1+2+3  / ENGE