livre (2) monde (2) puits (2) sociologie (2) baie (2) mare (2) lumière (2) revenu (2) géographie (2) champ (2) économie (2) science économique (2) développement économique (2) prélèvement (2) Area (2) Sheds (2) Specialists (2) Area (2) Expertise (2) Will (2) Sociology (2) Population (2) Political science (2) Persons (2) Organizational change (2) Manufacturers' agents (2) Human beings (2) Light (2) Income (2) Human capital (2)