You can visit Abhilekh patal (link is external) [9] search web portal of the department for Reference Media and Digitized Papers.
Links:
[1] http://nationalarchives.nic.in/content/general-information-records-holdings
[2] http://nationalarchives.nic.in/content/public-records-0
[3] http://nationalarchives.nic.in/content/cartographic-records
[4] http://nationalarchives.nic.in/content/departmental-records
[5] http://nationalarchives.nic.in/content/private-papers-0
[6] http://nationalarchives.nic.in/content/oriental-records-0
[7] http://nationalarchives.nic.in/content/microfilm-rolls-0
[8] http://nationalarchives.nic.in/content/library-0
[9] http://www.abhilekh-patal.in/jspui/