Liu, C. L. <br/><br/>
Elements of discrete mathematics / 
C. L. Liu. 
 - 2nd ed. 
 - New York,  McGraw-Hill;  c1985, 1986,2000. 
 - xiv, 433 p. : 
 - McGraw-Hill computer science series .
<br/><br/><label>ISBN: </label>007038133X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial analysis.
<br/><br/><label>Dewey Class. No.: </label>510  / El,2