Improving instruction in mathematics  V 1 and V 3 
NCERT, Field Services (Deptt. of...) 
 - Experimental edition 
 - Delhi, India  National Institute of Education   1969 
 - 94; ix,96p 
<br/><br/><label>Source: </label>Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics  - Teaching