Researches in colour vision [electronic resource] : and the trichromatic theory (1913)
Abney, William de Wiveleslie, Sir, 1843-1920, Parsons, John Herbert, Sir, 1868-1957, donor, Institute of Ophthalmology, University College, London. Library Services · London : Longmans, Green and Co. · leaf 64
Ophthalmology · Eye · Color vision · Color Perception
Internet Archive · UCL Library Services, University College London (UCL) · Public domain (published before 1931). Free to use for anything.
![An illustration from Researches in colour vision [electronic resource] : and the trichromatic theory, 1913, leaf 64](https://img.insideoutlibrary.com/img/1024/ia-b21287739-64-0.webp)
