DISTRIBUTION 551,841 Distribution of caitaracts in the population and influencing factors : Proceedings of the 3rd International Symposium on Cataract Epidemiology, Singapore, March 15-16, 1990 / vol.eds. K[azuyuki] Sasaki, Oftto] Hockwin. - Basel [etc.] : Karger, [1991], - [8], I8I s. : il., wykr. ; 24 cm (Developments in Ophthalmology ; vol.21) ISBN 3-8055-5333-8