539 oil and gas policy strategy and institutionsWB_539_OIL_AND_GAS_POLICY_STRATEGY_AND_INSTITUTIONS548 ppp in oil and gasWB_548_PPP_IN_OIL_AND_GAS507 energy and extractivesWB_507_ENERGY_AND_EXTRACTIVES2299 pipelinesWB_2299_PIPELINESUrbanURBANTax worldlanguages swedishTAX_WORLDLANGUAGES_SWEDISH