Graham, R.L. <br/><br/>
Handbook of combinatorics;v.2 

 - Amsterdam  Elsevier  1995 
 - 1021-2198p.  22cm 
<br/><br/><label>ISBN: </label>0444823514 
<br/><br/><label>Dewey Class. No.: </label>511.6,  / D, gra