Columbia subject headings:
Ultraviolet radiation--Environmental aspects.
Ultraviolet radiation--Physiological effect.
Ultraviolet radiation--Toxicology.
Harvard subject headings:
Ultraviolet radiation--Environmental aspects.
Ultraviolet radiation--Physiological effect.
Ultraviolet radiation--Toxicology.
Princeton subject headings:
Ultraviolet radiation--Environmental aspects.
Ultraviolet radiation--Health aspects.
Ultraviolet radiation--Physiological effect.