GERSTEIN, Larry.J. <br/><br/>
Discrete Mathematics and Algebraic Structures 

 - New York  W.H. Freeman and Company  1987 
 - xv, 413p. 
<br/><br/><label>ISBN: </label>0-7167-1804-9 
<br/><br/><label>Dewey Class. No.: </label>510