1. Anderson JR. Br J Ophthalmol 1953; 37: 267.
2. Proceedings of XVII Congress of Ophthalmology;Kestenbaum, A.;Acta Ophthalmol (Kbh),1955
3. Second Congress of International Strabismological Association. Paris-Marseille: Diffusion G6n6rale de;Cuppers, C.;Librarie
4. Fourth International Orthoptic Congress, in press. 5Cuppers C, Sevrin G. Bull Mem Soc Fr Ophtalmol;Scott, A.,1956