Columbia subject headings:
Agriculture--Economic aspects.
Capital.
Economic development.
Marxian economics.
Peasants.
Proletariat.
Harvard subject headings:
Agriculture--Economic aspects
Capital.
Economic development.
Marxian economics.
Peasants.
Proletariat.
Princeton subject headings:
Agriculture--Economic aspects.
Capital.
Economic development.
Marxian economics.
Peasants.
Proletariat.