Wilf, H.S <br/><br/>
Combinatorial algorithms  an update 
H.S. Wilf 
 - Philadelphia  SIAM  1989 
 - v  47 
 - CBMS-NSF regional conference series in applied mathematic 55 .
<br/><br/><label>ISBN: </label>0-89871-231-9 
<br/><br/><label>Dewey Class. No.: </label>511.6  / WIL