Polya, George  1887-1985 <br/><br/>
Mathematical discovery :  on understanding, learning, and teaching problem solving / 
George Polya. 
 - Combined ed. 
 - New York:   John Wiley,   1981.  
 - [432] p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references and indexes. 
<br/><br/><label>ISBN: </label>0471089753 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Problems, exercises, etc.
<br/><br/><label>Dewey Class. No.: </label>510.76