Columbia subject headings:
Indians of South America--Agriculture--Ecuador--History--16th century.
Indians of South America--Agriculture--Quito (Audiencia)--History--16th century.
Indians of South America--Cultural assimilation--Ecuador.
Harvard subject headings:
Agriculture--Social aspects--Ecuador.
Ecuador--Social conditions--16th century.
Indians of South America--Agriculture--Ecuador
Princeton subject headings:
Agriculture--Social aspects--Ecuador.
Ecuador--Social conditions--16th century.
Indians of South America--Agriculture--Ecuador.