administration (4) société (humaine) (4) science (4) itinéraire (4) région (4) productivité (4) pauvreté (4) minéral (4) législation (4) revenu (4) explosif (4) emploi (4) agriculture (4) activité minière (4) Complement (4) Employment (4) Agriculture (4) Accounts (4) Programs (4) Minerals (4) Employees (4) Value (4) Tin (4) Tantalum (4) State, The (4) Science (4) Prices (4) Poverty (4) Political science (4) Persons (4)