1. Visual pigments of the burbot, Lota lota, and seasonal changes in their relative proportions;Beatty;Vision Res.,1969
2. Absorption properties, interconversions and environmental adaptation of pigments from fish photoreceptors;Bridges,1965
3. The rhodopsin-porphyropsin visual system;Bridges,1972
4. Fishes of the Pacific coast of Canada;Clemens,1961