Columbia subject headings:
Animal rights--Moral and ethical aspects.
Animal welfare--Moral and ethical aspects.
Human-animal relationships--Moral and ethical aspects.
Harvard subject headings:
Animal rights
Animal rights--Moral and ethical aspects
Animal welfare--Moral and ethical aspects.
Human-animal relationships
Human-animal relationships--Moral and ethical aspects.
Princeton subject headings:
Animal rights--Moral and ethical aspects.
Animal welfare--Moral and ethical aspects.
Human-animal relationships--Moral and ethical aspects.