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Rod and Cone Pigments of the Atlantic Guitarfish, Rhinobatos lentiginosus Garman. Journal of Experimental Zoology, Supplement, 5, 85–87
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Visual pigment of Callorhinchus callorynchus, a southern hemisphere chimaeroid fish. Vision Research, 10(10), 939–942
DOI: 10.1016/0042-6989(70)90071-4