Columbia subject headings:
Harvard subject headings:
Altitude, Influence of--Peru.
Fonseca Martel, César.
Indians of South America--Agriculture--Peru
Indians of South America--Andes Region
Indians of South America--Peru
Princeton subject headings:
Altitude, Influence of--Peru.
Fonseca Martel, César.
Indians of South America--Agriculture--Peru.
Indians of South America--Andes Region.
Indians of South America--Peru.