van LOON, J A General medical aspects of keratoconus. [electronic resource] - Ophthalmologica. Journal international d'ophtalmologie. International journal of ophthalmology. Zeitschrift fur Augenheilkunde 1950 - 184-5 p. digital Publication Type: Journal Article ISSN: 0030-3755 Subjects--Topical Terms: HumansKeratoconus