Liu, C.L. <br/><br/>
Elements of discrete mathematics / 
C.L. Liu. 
 - New York :  McGraw-Hill,  c1977. 
 - x, 294 p. :  ill. ;  24 cm. 
 - McGraw-Hill computer science series. .
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0070381313 (hbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Combinatorial analysis.<br/>Algebra, Abstract.