Abstract
References
1.
Schnyder
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Klin. Monatbl. f. Augenheilk. , 1923 , lxx , 45 ; ibid. , 1924, lxxiii, 418.
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Proc. Roy. Soc. Med , 1927 , xx (Sect. Ophth.), 67 ; Trans. Ophth. Soc. U.K. , 1928, xlviii, 97.