Wolf,Robert S. <br/><br/>
Proof,logic and conjecture: the mathematician's tool box. / 
Wolf,Robert S. 
 - New York:  W.H.Freeman & Company,  1998. 
 - xiv,421p;26cm 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0716730502 
<br/><br/><label>Dewey Class. No.: </label>511.3 WOL