Research 20 Social sciences 14 PUBLICACIONES PERIODICAS 13 Medicine 12 Psychology 12 Economic conditions 11 Economic history 11 History 11 Economics 10 Engineering 10 Politics and government 10 Science 9 Study and teaching 9 Education 8 Management 8 Public health 8 Social conditions 8 Agriculture 7 Biology 6 History and criticism 6 Architecture 5 Business 5 City planning 5 Civilization 5 Humanities 5 Sociology 5 Accounting 4 Botany 4 Communication 4 Education, Higher 4