Columbia subject headings:
Cognition in animals.
Dolphins--Behavior.
Dolphins--Psychology.
Mammals--Behavior.
Mammals--Psychology.
Harvard subject headings:
Cognition in animals--Congresses.
Dolphins--Behavior--Congresses.
Dolphins--Psychology--Congresses.
Mammals--Behavior--Congresses
Mammals--Psychology--Congresses.
Princeton subject headings:
Cognition in animals.
Dolphins--Behavior.
Dolphins--Psychology.
Mammals--Behavior.
Mammals--Psychology.