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APA Citation
Atkinson, J., Braddick, O., Pimm-Smith, E., Ayling, L., & Sawyer, R. (1981). does the Catford drum give an accurate assessment of acuity?. British journal of ophthalmology, 65(9), 652–656. http://access.bl.uk/ark:/81055/vdc_100137792023.0x000048