Sawyer, W. W. <br/><br/>
Vision in elementary  mathematics :  Introducing mathematics 1 / 
by W. W. Sawyer 
 - New York :  Penguin Books ,  1964. 
 - 346 p.  Paper Back 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Elementary mathematics <br/>Divisibility <br/>Graphs<br/>Fractions 
<br/><br/><label>Dewey Class. No.: </label>510    / SAW-V