Honsberger, Ross <br/><br/>
Ingenuity In Mathematics ( Volume-23 ) 
/ by Ross Honsberger 
 - Washington;  The Mathematical Association of America:  1970. 
 - vii, 206p. 
<br/><br/><label>ISBN: </label>0883856239 
<br/><br/><label>Dewey Class. No.: </label>511  / HON/I