Acquired colour vision deficiencies.First Symposium of the International Research Group on Colour Vision Deficiencies,Ghent, June 24-26,1971.
Card's contents:518,102 VERRIEST G. /Red./ Acquired colour vision deficiencies.First Symposium of the International Research Group on Colour Vision Deficiencies,Ghent, June 24-26,1971. Ed. G.Verriest. Basel 1972 S.Karger 8° s. X, 230,ilustr. Modern Problems in Ophthalmology Vol.11.