National Council of Educational Research and Training <br/><br/>
Electricity at work  Classes VI-VIII 

 -  National Council for Educational Research and Training  1987 
 - (12),54  Pb  24cm 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>643.7