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HARVARD Citation
Gilbert, M. et al. (1949). THE ILLUMINATION OF THE SNELLEN CHART. British journal of ophthalmology. 33 (5), pp. 305-310. [Online].
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Gilbert, M. et al. (1949). THE ILLUMINATION OF THE SNELLEN CHART. British journal of ophthalmology. 33 (5), pp. 305-310. [Online].