Congresses 662 History 457 Economic conditions 272 Politics and government 270 Social conditions 227 Civilization 167 History and criticism 164 more ... Economic policy 161 Women 147 Economic integration 146 Relations 145 Education 112 Foreign relations 111 Social aspects 103 Foreign economic relations 90 Indians 85 Social policy 85 Democracy 80 Economic aspects 77 Human rights 63 Latin American literature 63 Research 62 Economic development 55 Emigration and immigration 55 Government policy 55 Study and teaching 55 Agriculture 54 Indians of South America 53 Urbanization 51 Finance 50 less ...