School chemistry :  class 7 :  teacher's guide / 
prepared by NCERT Chemistry Study Groups 
 - New Delhi :  National Council of Educational Research and Training,  1968 
 - 33 p. ;  25 cm. 
<br/><br/> Experimental edition 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemistry--Study and teaching
<br/><br/><label>Dewey Class. No.: </label>540