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Measurement of cone density in the human retina by undersampling techniquesIn Enrique Villanueva (ed.), Perception, Ridgeview Pub. Co. pp. 112-112. 1996.
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3Chromatic intensities with achromatic surroundsIn Enrique Villanueva (ed.), Perception, Ridgeview Pub. Co. pp. 18-18. 1996.