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2. DIAMOND, S., BORLEY, W. E., and MILLER, W. W. (1964). Ibid., 57, 88.
3. FLIERINGA, H. J. (1961). Trans. ophthal. Soc. U.K., 81, 421.
4. FRIEDE, R. (1953). Ophthalmologica (Basel), 126, 294.
5. FRIEDE, R. (1956). Ibid., 131, 168.