Liu, C. L, <br/><br/>
Elements of discrete mathematics 

 - 2nd ed. 
 - New York:  McGraw-Hill,  1985. 
 - xiv, 433 p. :   ill.;  24 cm. 
 - McGraw-Hill computer science series. .
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780071005449 
<br/><br/><label>Dewey Class. No.: </label>511 LIU