Cameron, P.J. <br/><br/>
Designs, graphs, codes and their links 

 - Cambridge  Cambridge University Press  1991 
 - ix,240p.  23 cm. 
 - London mathematical society students texts .
<br/><br/><label>ISBN: </label>0521423856 
<br/><br/><label>Dewey Class. No.: </label>511,D,cam  / _