title: Gordon Fain.
mesh_terms: D000818:Animals; D049673:History, 20th Century; D049674:History, 21st Century; D020419:Photoreceptor Cells, Vertebrate / Q000502:physiology*; D010827:Physiology / Q000266:history*; D014481:United States; D014714:Vertebrates / Q000502:physiology*