Teachers guide to learning science , pt. 2 and 3 :  text book for classes vi-viii / 
Department of education in science and mathematics , Govt. of India 
 - ii :  N.C.E.R.T ,  1983 
 - 262 p.:  20 cm 
<br/><br/> Based on integrated science curriculum 
<br/><br/><label>ISBN: </label> Rs.11.15 
<br/><br/><label>Dewey Class. No.: </label>507