Digital images of sahaje muskil āsān, a guide to overcoming problems and obstacles. Written by sandip śāstrī, published by Sandhya Prakashani, September 2006.
"The original material is owned and held by Rudrajit Mookherjee. Access enquiries should be addressed to Mr Mookherjee via the School of Cultural Texts and Records, Jadavpur University, Kolkata.".