Columbia subject headings:
Agricultural development projects--Peru--Colca River Valley (Arequipa)
Colca River Valley (Arequipa, Peru)--Economic conditions.
Colca River Valley (Arequipa, Peru)--Social conditions.
Programa Rural Valle del Colca (Peru)
Rural development projects--Peru--Colca River Valley (Arequipa)
Harvard subject headings:
Agricultural development projects--Peru--Colca River Valley (Arequipa)
Peasants--Peru--Colca River Valley (Arequipa)
Rural development projects--Peru--Colca River Valley (Arequipa)
Princeton subject headings:
Agricultural development projects--Peru--Colca River Valley (Arequipa).
Peasants--Peru--Colca River Valley (Arequipa).
Rural development projects--Peru--Colca River Valley (Arequipa).