Freudenthal Hans <br/><br/>
Mathematics observed.Tr from the German by Stephen 

 - London  Weidenfeld and Nicolson          1967 
 - 265p  cm. 
 - World University Library .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathemaics
<br/><br/><label>Dewey Class. No.: </label>B, K7