title: Vertebrate circadian and photoperiodic systems: role of the pineal gland and melatonin.
authors.affiliation: Department of Zoology, North Carolina State University, Raleigh 27695.
authors.forename: H
authors.initials: H
authors.lastname: Underwood
authors.forename: B D
authors.initials: BD
authors.lastname: Goldman
mesh_terms: D000818:Animals; D002940:Circadian Rhythm / Q000502:physiology*; D008027:Light; D008550:Melatonin / Q000502:physiology*; D010507:Periodicity; D010870:Pineal Gland / Q000502:physiology*; D014714:Vertebrates / Q000502:physiology*
chemical_list: D008550:Melatonin