Niven, Ivan, <br/><br/>
Mathematics of choice or how to count without counting  
/ by Ivan Niven 
 - 1a ed. 
 - Washington :   Mathematical Association of America,   1965 
 - 202 p. :  ěl. ;  24 cm. 
 - New Mathematical Library ;   15 .
<br/><br/>Incluye bibliografia  e ěndice 
<br/><br/><label>ISBN: </label>088385600X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Análisis combinatorio
<br/><br/><label>LC Class. No.: </label>QA164  / N58 1965