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Subject
- History29
- Agriculture17
- Economic aspects10
- Agriculture and state6
- Economic conditions6
- Peasants6
- Politics and government5
- Agricultural laborers4
- Social aspects4
- Labor unions3
- Natural resources3
- Political activity3
- Social conditions3
- Agricultural assistance2
- Agricultural colonies2
- Agriculture, Cooperative2
- Aspect économique2
- Collectivization of agriculture2
- Description and travel2
- Economic history2