1. Aetiology of spheroidal degeneration of the cornea in Labrador;Johnson, G.J.;Br J Ophthalmol,1981
2. Survey of ophthalmic conditions in a Labrador community. 11: Ocular disease;Johnson, G.J.; Green, J.S.; Paterson, G.D.; Perkins, E.S.;Can J Ophthalmol,1984
3. Ultra-violet radiation as a possible cause of corneal degenerative changes under certain physiograph conditions;Roger, F.C.; Uthill, J.A.; Fydelor, P.J.; Lenham, A.P.;Acta Ophthalmol (Kbh),1974
4. The environment and the lens;Taylor, H.R.;Br J Ophthalmol,1980