Working Paper
                        
                        Bhattacharjee, Harsha, Kalyan  Das, Rishi Raj  Borah, Kamalesh  Guha, Parikshit  Gogate, S  Purukayastha, and Clare  Gilbert.  
"Causes of childhood blindness in the northeastern states of India." Indian journal of ophthalmology 56, no. 6 (2008): 495-499.