Somsak Wongsawass. (1991) Factors affecting visual outcome after cataract extraction in Ramathibodi hospital. Mahidol University,:ม.ป.ท.Somsak Wongsawass. 1991. Factors affecting visual outcome after cataract extraction in Ramathibodi hospital. ม.ป.ท.:Mahidol University,;Somsak Wongsawass. Factors affecting visual outcome after cataract extraction in Ramathibodi hospital. ม.ป.ท.:Mahidol University, 1991. Print.