Columbia subject headings:
Harvard subject headings:
Indians of Central America--Population--Congresses.
Indians of Mexico--Population--Congresses.
Indians of South America--Population--Congresses.
Indians--Economic conditions--Congresses.
Indians--Population--Congresses.
Indians--Social conditions--Congresses.
Princeton subject headings:
Indians of Central America--Population--Congresses.
Indians of Mexico--Population--Congresses.
Indians of South America--Population--Congresses.