Welsh, D. J. A. <br/><br/>
Combinatorial Mathematics And Its Applications 
/ edited by D. J. A. Welsh 
 - London;  Academic Press Inc. ( London ) Ltd.:  1971. 
 - x, 364p. 
<br/><br/><label>ISBN: </label>0127433503 
<br/><br/><label>Dewey Class. No.: </label>512.5  / WEL/C