General Science Hand book of Activities :  class vi-viii / 
National Council of Educational Research and Traning (New Delhi, India) 
 - New Delhi :  N. C. E. R. T.,  1964 
 - 458 p. ;  27 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Handbooks, manuals, etc.
<br/><br/><label>Dewey Class. No.: </label>507