Columbia subject headings:
Agricultural colonies--Amazon River Region--Congresses.
Amazon River Region--Population--Congresses.
Deforestation--Amazon River Region--Congresses.
Indians of South America--Amazon River Region--Congresses.
Land settlement--Amazon River Region--Congresses.
Nature--Effect of human beings on--Amazon River Region--Congresses.
Harvard subject headings:
Agricultural colonies--Amazon River Region--Congresses.
Amazon River Region--Population--Congresses.
Deforestation--Amazon River Region--Congresses.
Indians of South America--Amazon River Region--Congresses.
Land settlement--Amazon River Region--Congresses.
Nature--Effect of human beings on--Amazon River Region--Congresses.
Princeton subject headings:
Agricultural colonies--Amazon River Region--Congresses.
Amazon River Region--Population--Congresses.
Deforestation--Amazon River Region--Congresses.
Indians of South America--Amazon River Region--Congresses.
Land settlement--Amazon River Region--Congresses.
Nature--Effect of human beings on--Amazon River Region--Congresses.