1. Arch;CALHOUN, F.P.;Ophthal. (Chicago); Roy,1908
2. DOLLERY, C. T., and OAKLEY, N. W. (1965) Diabetes, 14, I21 FERRY, A. P. (1963) Arch. Ophthal. (Chicago), 70, 346
3. GREEAR, J. N. (1942) Ibid., 28, 467
4. Arch;HAGEDOORN, A.;Augenheilk,1928
5. Amer;HENKIND, P.;J. Ophthal,1963