Heritage, Raymond S. <br/><br/>
Learning mathematics book1 
Raymond S. Heritage 
 - Harmondsworth  Penguin Books  1971 
 - 288p.  ill.  23cm. 
<br/><br/>Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Study and teaching (Elementary)
<br/><br/><label>LC Class. No.: </label>MATH QA11.H4