Courant, Richard <br/><br/>
What in mathematics?  elementary approach to ideas and methods 
Richard Courant, Herbert Robbins 
 - London  Oxford University  c1941 
 - xix, 521 p.  23 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Mathematics - Study and teaching<br/>Mathematics - Study and teaching(Elementary).