Columbia subject headings:
Black people--Physiology.
Human skin color.
Melanins.
Melanocytes.
Skin--Physiology.
Harvard subject headings:
Black people--Physiology.
Human skin color
Melanins
Melanocytes
Skin--Physiology
Princeton subject headings:
Black people--Physiology.
Human skin color.
Melanins.
Melanocytes.
Skin--Physiology.