Courant, Richard <br/><br/>
What is mathematics? : an elementary approach to ideas and methods. 

 - London :  Oxford university press,  c1941. 
 - 521 p. :  il.  ;  23,5 cm 
<br/><br/> Apendice y bibliografia: p. 487-514 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MATEMATICAS
<br/><br/><label>Universal Decimal Class. No.: </label>51