Columbia subject headings:
Papaloapan River Valley (Mexico)--Biography.
Papaloapan River Valley (Mexico)--History.
Harvard subject headings:
Encomiendas (Latin America)--History.
Indians of Mexico--Land tenure--Mexico--Papaloapan River Region.
Indians of Mexico--Mexico--Papaloapan River Region--History.
Indians of Mexico--Mexico--Papaloapan River Region--Social conditions.
Princeton subject headings: