Columbia subject headings:
Agriculture--International cooperation--Congresses.
Energy policy--International cooperation--Congresses.
Food supply--Congresses.
Harvard subject headings:
Agriculture--International cooperation--Congresses.
Energy policy--International cooperation--Congresses.
Food supply--Congresses
Princeton subject headings:
Agriculture--International cooperation--Congresses.
Energy policy--International cooperation--Congresses.
Food supply--Congresses.