Columbia subject headings:
Education--Southern Cone of South America--Congresses.
Indians of South America--Education--Congresses.
Language and education--Southern Cone of South America--Congresses.
Harvard subject headings:
Education--Southern Cone of South America--Congresses.
Indians of South America--Education--Congresses.
Language and education--Southern Cone of South America--Congresses.
Princeton subject headings: