monde (1) puits (1) temps (durée) (1) technologie (1) recherche (1) projet (1) association (1) évolution (1) agriculture (1) aide au développement (1) biens (1) Ouest (1) Development (1) Area (1) Agriculture (1) Acquisition (1) Interviews (1) Commerce (1) Area (1) Work (1) Values (1) Time (1) Technology (1) Social sciences (1) Social groups (1) Sharing (1) Research (1) Reciprocity (Commerce) (1) Process (Law) (1) Persons (1)