Johnsonbaugh, Richard. <br/><br/>
Essential discrete mathematics / 
Richard Johnsonbaugh. 
 - New York :  Macmillan,  c1987. 
 - 559 p. 
<br/><br/><label>ISBN: </label>0023606304 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic data processing--Mathematics.<br/>Mathematics--1961-.
<br/><br/><label>LC Class. No.: </label>QA39.2  / .J66