Cite
MLA Citation
M. Gilbert and R. G. Hopkinson. “THE ILLUMINATION OF THE SNELLEN CHART.” British journal of ophthalmology, vol. 33, no. 5, 1949, pp. 305–310. http://access.bl.uk/ark:/81055/vdc_100135139919.0x000048
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M. Gilbert and R. G. Hopkinson. “THE ILLUMINATION OF THE SNELLEN CHART.” British journal of ophthalmology, vol. 33, no. 5, 1949, pp. 305–310. http://access.bl.uk/ark:/81055/vdc_100135139919.0x000048