Foreign relations 13 Politics and government 13 Periodicals 9 Peace 8 Economic history 7 World politics 7 Arbitration, International 6 History 6 International relations 5 World War, 1914-1918 5 International law 4 Labor laws and legislation, International 4 Security, International 4 Biography 3 Disarmament 3 Economic policy 3 International cooperation 3 Italo-Ethiopian War, 1935-1936 3 Japanese 3 Mandates 3 Codification 2 Democracy 2 Depressions 2 International finance 2 Population 2 Public health 2 Sanctions (International law) 2 Statesmen 2 War 2 World health 2