1. Childhood blindness in Cyprus;Merin, S.; Lapithis, A.G.; Horovitz, D.; Michaelson, I.C.;Am J Ophthalmol,1972
2. Childhood blindness in Lebanon;Baghdassarian, S.A.; Tabbara, K.F.;Am J Ophthalmol,1975
3. The causes of blindness in childhood. A study of 766 children with severe visual handicaps;Fraser, G.R.; Friedman, A.I.,1967
4. Causes of severe visual handicap among school children in Southern Australia;Fraser, G.R.;Med J Aust,1968
5. Causes of blindness in Canada;Macdonald, A.E.;Can Med Assoc J,1965