Petroleum industry and trade -- Political aspects 8 Government policy -- 7 Energy policy -- 6 Political aspects -- 6 Gas industry -- 5 Politics and government -- 5 more ... Economic aspects 4 History -- 4 Politics and government 4 Economic conditions -- 3 Economic policy 3 Energy policy 3 Foreign relations -- 3 Petroleum industry and trade 3 World politics -- 3 Congresses 2 Economic conditions 2 Energy industries -- 2 Forecasting -- 2 Foreign economic relations 2 Foreign relations 2 History 2 International economic relations 2 National security -- 2 Offshore oil industry -- 2 Petroleum reserves -- 2 Asia, Southeastern 1 Bibliography -- 1 Business cycles 1 less ...