Chetwynd, A., <br/><br/>
Discrete Mathematics 
A Chetwynd, P Diggle 
 - Boston :  Butterworth Heinemann,  c1995. 
 - vi, 209 p.:  [148] 
<br/><br/><label>ISBN: </label>0 340 61047 6 
<br/><br/><label>Dewey Class. No.: </label>511.3  / CHE/DIS