Columbia subject headings:
Indians of South America--Ecuador--Economic conditions.
Indians of South America--Ecuador--Social conditions.
Indians of South America--Health and hygiene--Ecuador.
Harvard subject headings:
Indians of South America--Health and hygiene--Ecuador.
Indians of South America--Medicine--Ecuador.
Indians of South America--Science--Ecuador.
Princeton subject headings:
Indians of South America--Ecuador--Economic conditions.
Indians of South America--Ecuador--Social conditions.
Indians of South America--Health and hygiene--Ecuador.