Riordan, John. <br/><br/>
An introduction to combinatorial analysis 

 - Princenton, N. J. :  Pricenton,  1978 
 - 244 p. 
<br/><br/><label>LCCN: </label>48679 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Analisis combinatorio.
<br/><br/><label>Dewey Class. No.: </label>511.6  / R5