Columbia subject headings:
Civilization, Modern--Public opinion--Congresses.
Indians of South America--Bolivia--Attitudes--Congresses.
Progress--Public opinion--Congresses.
Harvard subject headings:
Aymara Indians--Social life and customs--Congresses.
Guarani Indians--Social life and customs--Congresses.
Progress--Philosophy--Congresses.
Quechua Indians--Social life and customs--Congresses.
Social change--Bolivia--Congresses.
Social planning--Bolivia--Congresses.
Princeton subject headings: