Heritage, Raymond S. <br/><br/>
Learning mathematics (book - 3)/ 
Raymond S. Heritage. 
 - Middlesex:  Penguin book,  1971. 
 - 240 p. :  plans, tables, diagrs. ;  23 cm. 
<br/><br/>Includes index (239 - 240 p.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Learning
<br/><br/><label>LC Class. No.: </label>LB1060