Columbia subject headings:
Cooperativeness--Congresses.
Human behavior--Congresses.
Mammals--Behavior--Congresses.
Primates--Behavior--Congresses.
Social behavior in animals--Congresses.
Harvard subject headings:
Cooperativeness--Congresses.
Human behavior--Congresses
Mammals--Behavior--Congresses
Primates--Behavior--Congresses
Social behavior in animals--Congresses
Princeton subject headings: