Columbia subject headings:
Harvard subject headings:
Indians of Mexico--Mexico--Mezquital Valley (Hidalgo)--Economic conditions.
Mezquital Valley (Hidalgo, Mexico)--Economic conditions.
Otomi Indians--Economic conditions.
Peasants--Mexico--Mezquital Valley (Hidalgo)--Interviews.
Princeton subject headings:
Agriculture--Economic conditions--Mexico--Valle del Mezquital.
Durango (Mexico : State)--Rural conditions.