Columbia subject headings:
Agriculture--Research--Congresses.
Benin--Economic conditions--Congresses.
Benin--Social conditions--Congresses.
Humanities--Benin--Congresses.
Science--Congresses.
Social sciences--Benin--Congresses.
Sports--Benin--Congresses.
Technology--Research--Congresses.
Harvard subject headings:
Agriculture--Research--Congresses
Benin--Economic conditions--Congresses.
Benin--Social conditions--Congresses.
Humanities--Benin--Congresses.
Science--Congresses
Social sciences--Benin--Congresses.
Sports--Benin--Congresses.
Technology--Research--Congresses.
Princeton subject headings: