P�olya, George. <br/><br/>
How to solve it :  a new aspect of mathematical method. 

 - 2d ed. 
 - Garden City, N.Y., :  Doubleday,  1957. 
 - 253 p. 
 - Doubleday anchor books, A93 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching.<br/>Mathematics--Problems, exercises, etc.