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3. CHAVARRIA LOPEZ, F. A. (1946). Arch. Soc. oftal. hisp.-amer., 6, 1127. Vide abstract in Arch. Ophthal., Chicago (1948), 40, 358.
4. COSTENBADER, F, D. (1945). Amner. J. Ophthal., 28, 754.
5. ELLIOT, A. J (1941). Ibid., 24, 682.