Annual Report of the Massachusetts Eye and Ear Infirmary, Boston, 51 (1935); 51 (1936). Ludvigh, Elek and McCarthy, E. F., "Absorption of Visible Light by the ...
See for example Houstoun's ” Vision and Colour Vision”, p. 89 (Longmans Green and Co., London, 1932). Hecht, S., and Williams, R. E., J. Gen. Physiol., 5, 1 (1922).
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