1. , GITTER, K. A., BEST, M., and GALIN, M. A. (1970) Ibid., 69, 39 DAVID, N. J., NORTON, E. W. D., GASS, J. D., and BEAUCHAMP, j. ( 967) Arch. Ophthal. (Chicago), 77, 6I9
2. Amer;ERNEST, J.T.; POTT3, A.M.;J. Ophthal; Arch,1968
3. Arch;HAMASAKI, D.I.; FUJINO, T.;Ophthal. (Chicago); Brit,1967
4. HENKIND, P., and LEVITZKY, M. (1969) Ibid., 68, 979
5. LEVITZKY, M., and HENKIND, P. (1969) Ibid., 68, 986