Occupational and medicative hazards in ophthalmology : 3rd Congress of the European Society of Ophthalmology = 3. Kongress der Europäischen Gesellschaft für Ophthalmologie = 3e Congrès de la Société Européenene d'Ophtalmologie : under the high patronage of Her Majesty the Queen of Netherlands, Amsterdam, 18-21 June, 1968 - François, Jules, 1907-1984 (S. Karger, 1969)