"Hsia [Y] and Graham [C H]" Contains photocopies and articles extracted from journals, comprising: extracted article "Some Visual Functions of a Unilaterally Color-Blind Person. I. Critical Fusion Frequency in Various Spectral Regions" by Eda Berger, C H Graham, and Yun Hsia, in ''Journal of the Optical Society of America', vol. 48, number 9, (September 1958); extracted page containing article "Visual Discrimination of a Subject with Acquired Unilateral Tritanopia" by C H Graham, Y Hsia and F F Stephan, in 'Science', vol. 140, issue 3565, (26 April 1963); extracted article "Color Defect and Color Theory" by C H Graham and Y Hsia, in 'Science', vol. 127, issue 3300, (28 March 1958); photocopy of article "Spectral Luminosity Curves for Protanopic, Deuteranopic, and Normal Subjects" by Y Hsia and C H Graham, in 'Proceedings of the National Academy of Sciences', vol. 43, number 11, (1957); photocopy of article "Factors that Influence the Resolution of Visual Detail during Dark Adaptation" by C H Graham (1953); photocopy of parts of Graham's section on "Color Theory" in 'Psychology: A Study of Science, vol. 1, Sensory, Perceptual and Physiological Formulations', edited by S Koch, (New York: McGraw-Hill, 1959); photocopied abstracted pages of tables from "Spectral Luminosity Curves for Protanopic, Deutanopic and Normal Subjects" by Y Hsia and C H Graham, in 'Proceedings of the National Academy of Sciences', vol. 43, number 11, (1957); photocopy of "Studies of Color Blindness: A Unilaterally Dichromatic Subject" by C H Graham and Y Hsia, in 'Proceedings of the National Academy of Sciences', vol. 45, number 1, (January 1959). 1957-1963