Columbia subject headings:
Agricultural ecology--Amazon River Region--Congresses.
Indians of South America--Amazon River Region--Government relations--Congresses.
Investments--Amazon River Region--Congresses.
Land settlement--Amazon River Region--Congresses.
Harvard subject headings:
Agricultural ecology--Amazon River Region--Congresses.
Indians of South America--Amazon River Region--Government relations--Congresses.
Investments--Amazon River Region--Congresses.
Land settlement--Amazon River Region--Congresses.
Princeton subject headings:
Agricultural ecology--Amazon River Region--Congresses.
Indians of South America--Amazon River Region--Government relations--Congresses.
Investments--Amazon River Region--Congresses.
Land settlement--Amazon River Region--Congresses.