Politics and government 9 History 8 Economic policy 7 Economic conditions 5 Foreign relations 5 Communism 4 Social conditions 4 Economics 3 Research 3 Social policy 3 Agriculture 2 Biography 2 Boundaries 2 Cities and towns 2 Congresses 2 Economic aspects 2 Education 2 Elections 2 Federal government 2 Industrial relations 2 Mathematical models 2 Political parties 2 Public welfare 2 Sino-Indian Border Dispute, 1957- 2 Socialism 2 Accounting 1 Agriculture and state 1 Aims and objectives 1 Analysis (Philosophy) 1 Attitudes 1