Liu, C.L. <br/><br/>
Elements of discrete mathematics   
by C L Liu 
 - 2nd ed. 
 - New York  McGraw-Hill  1985 
 - xiv, 433p 
 - McGraw-Hill computer science series .
<br/><br/><label>ISBN: </label>007038133X 
<br/><br/><label>Dewey Class. No.: </label>511  / N851;2