Columbia subject headings:
Indians of South America--Argentina--Chaco--Economic conditions.
Indians of South America--Argentina--Chaco--Social conditions.
Harvard subject headings:
Indians of South America--Argentina--Chaco--Economic conditions.
Indians of South America--Argentina--Chaco--Social conditions.
Indians of South America--Argentina--Formosa (Province)--Economic conditions.
Indians of South America--Argentina--Formosa (Province)--Social conditions.
Indians of South America--Argentina--Salta (Province)--Economic conditions.
Indians of South America--Argentina--Salta (Province)--Social conditions.
Princeton subject headings:
Indians of South America--Argentina--Chaco--Economic conditions.
Indians of South America--Argentina--Chaco--Social conditions.