K. O. Donner

• On vision in Pontoporeia affinis and P. femorata (Crustacea, Amphipoda)
• Science and technology policies in Finland and Hungary
• The scotopic spectral sensitivity of the clawed toad (Xenopus laevis)
• The spike frequencies of mammalian retinal elements as a function of wave-length of light
• The visual acuity of some passerine birds