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  1. By: Hess, Carl von, - Versammlung deutscher Naturforscher und Ärtze Vienna, Austria) - University College, London. Library Services.
    Publication info: Wiesbaden, verlag von J. F. Bergmann, 1914
    Holding Institution: UCL Library Services, University College London (UCL)
    Subjects: Animals  Color vision  Electronic books  Ophthalmology  Photoreceptors  
  2. By: Parsons, John Herbert, Sir,
    Publication info: Cambridge [Eng.], University Press, 1915
    Holding Institution: MBLWHOI Library
    Subjects: Color vision
  3. By: Parsons, John Herbert, Sir,
    Publication info: Cambridge [Eng.], University Press, 1915
    Holding Institution: MBLWHOI Library
    Subjects: Color vision