1. Trans;ARRUGA, H.;Amer. Acad. Ophthal. Otolaryng; Discussion of Rosengren,1952
2. Klin;DELLAPORTA, A.;Mbl. Augenheilk,1953
3. HOWARD, G. M., and CAMPBELL, C. J. (1969) Arch. Ophihal. (Chicago), 8i, 317
4. JUNGSCHAFFER, 0. H. (1971) Ibid., 86, 19
5. MADROSZKIEWICZ, M. (I 958) Brit. J. Ophthal., 42, 739 PHILLIPS, C. I. (1958) Ibid., 42, 739 REGENBOGEN, L., and STEIN, R. (1968) Arch. Ophthal. (Chicago), 8o, 155