Petroleum industry and trade -- Political aspects 8 Energy policy -- 7 Government policy -- 7 Political aspects -- 6 Foreign relations -- 5 World politics -- 5 more ... Energy industries -- 4 Energy policy 4 Gas industry -- 4 Congresses 3 Congresses -- 3 Economic aspects 3 Economic conditions -- 3 History 3 History -- 3 Petroleum industry and trade 3 Addresses, essays, lectures 2 Asia 2 China 2 Economic conditions 2 Environmental aspects 2 Environmental aspects -- 2 Forecasting -- 2 Government policy 2 International economic relations 2 Pacific Area 2 Petroleum -- 2 Petroleum reserves -- 2 Politics and government 2 less ...