CLAYTON (H W) & STRAKER (D N). <br/><br/>
Natural approach to mathematics. Ed.2 (Part 5). 

 - NY  Pergamon Press  1972 
 - 252 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics natural approach
<br/><br/><label>Dewey Class. No.: </label>510 CLAN