Hermann von Helmholtz: Handbuch der physiologischen Optik (1896)

 
Picture: Hermann von Helmholtz: Handbuch der physiologischen Optik (1896)

Hermann von Helmholtz: Handbuch der physiologischen Optik (1896)

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          • Limited range of three spectral primary colours

            Picture: Limited  range of three spectral primary colours

            Name that can easily go onto 2 lines

            Author that can easily go onto 2 lines as well