Colour vision deficiencies 111 : proceedings of the third symposium of the international group research on colour vision deficiencies, Amsterdam/Leiden, June 25-27, 1975 - Verriest, G. (Guy); International Group Research on Colour Vision Deficiencies, Amsterdam/Leiden,June 25-27, 1975 (Basel : S. Karger, 1975)
Keywords: Colour vision -- Testing -- Congresses