Columbia subject headings:
Biodiversity--Peru.
Potatoes--Economic aspects--Peru.
Potatoes--Varieties--Peru.
Potatoes--Yields--Peru.
Sharecropping--Peru.
Harvard subject headings:
Agriculture, Cooperative--Peru.
Biodiversity--Peru.
Peasants--Peru
Potato industry--Peru.
Potatoes--Economic aspects--Peru.
Potatoes--Varieties--Peru.
Potatoes--Yields--Peru.
Sharecropping--Peru.
Princeton subject headings:
Agriculture, Cooperative--Peru.
Peasants--Peru.
Potato industry--Peru.
Potatoes--Peru.