Gopalakishnan,K.V. <br/><br/>
Inventors who revolutionised our lives/by K.V. Gopalakrishnan 

 - New Delhi  National Book Trust India Pvt.  1999 
 - 152p. 
<br/><br/><label>ISBN: </label>8123726686 
<br/><br/><label>Dewey Class. No.: </label>925  G646I