The News of the National Board of Examination Volume 1 Number 3 Oct-December, 2005 Page 4. http://www.natboard.edu.in/news_latters/NBE%20BulletinVol.I%20No.3,%20October-Dec%202005.pdf
http://www.natboard.edu.in/news_latters/NBE%20BulletinVol.I%20No.3,%20October-Dec%202005.pdf