W. W Sawyer <br/><br/>
Vision in elementary mathematics 

 - England  Penguin books Limited  1964 
 - 345p 
<br/><br/>W. W Sawyer: Vision in elementary mathematics.  England.  Penguin books Limited, 1964.--(510SAW)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>Dewey Class. No.: </label>510  / SAW