Lepkowski, James M; Brilliant, L B; Pokhrel, R P; Grasset, N C; Kolstad, A; Hawks, W N; Pararajasegaram, R; Brilliant, G E; Gilbert, S; Shrestha, Sundar R. (1985). Epidemiology of blindness in Nepal. Bulletin of the World Health Organization. 63(2), 375-386.