Columbia subject headings:
Agriculture, Prehistoric--Tropics.
Harvard subject headings:
Agriculture, Prehistoric--Oceania--Congresses.
Agriculture, Prehistoric--Tropics--Congresses.
America--Antiquities--Congresses.
Indians--Agriculture--Congresses
Oceania--Antiquities--Congresses.
Princeton subject headings:
Agriculture, Prehistoric--Oceania--Congresses.
Agriculture, Prehistoric--Tropics--Congresses.
America--Antiquities--Congresses.
Indians--Agriculture--Congresses.
Oceania--Antiquities--Congresses.