Progress of Lens Biochemistry Research Volume in honour of Prof. Dr. med. J. Nordmann formatIsbn:Softcover 9789061931485 They contain minerals and vitamins van Oystaeyen They contain minerals and vitamins essential for a balanced diet in humans Chapter 5 deals with cross cultural variationin homogeneous circle of civilization We have been able to make this dedication thanks to Professor HENKES who readily agreed to publish our contributions in Documenta Ophthal mologica The editor has received several letters of longstanding friends who would have liked to submit a manuscript but had been unable to meet the deadline: Professor NORDMANN may rest assured that they