Bereau of Indian Standards, <br/><br/>
ETDS23-Electric lamps and their auxiliaries IFC/TC 34 / 

 - Bureau of Indian Standards,  c2006 
 - ill. ;  30*21 cm. 
 -  Vol. 1  .
<br/><br/><label>LC Class. No.: </label>7448-7450 
<br/><br/><label>Dewey Class. No.: </label>621.32