Honsberger, Ross <br/><br/>
Ingenuity in mathematics   
by Ross Honsberger 
 - Washington  Mathematical Association of America  1970 
 - vii, 206p. 
 - New Mathematical Library, V.23 .
<br/><br/><label>ISBN: </label>0883856239 
<br/><br/><label>Dewey Class. No.: </label>510  / N7015