THAPAR'S <br/><br/>
Indian industrial directory, 1994-95, pt.I & II, vol.I 
THAPAR'S 
 - Ed 16th 
 - Bombay  Bombay, Sunderdas Gianchand  1995 
 - 975p 
 -  v.1 .
<br/><br/><label>Source: </label>Textbook