Colour vision deficiencies
Card's contents:VARRIEST G. / red./ 527,997 Colour vision deficiencies Basel 1978 S.Karger 8 Modern Problems in Ophthalmology vol.19 [Vol.] . 4.4th Symposium of the Interna- tional Research Group on... Farms,June 27-30,1977.Vol.ed.G.Varriest.s.XI,nlb.1, 348,il.