History 20 SOCIAL SCIENCE 16 Social Sciences 15 MEDICAL 13 EDUCATION 12 Education 12 Social aspects 10 LANGUAGE ARTS & DISCIPLINES 8 Public health 6 Social conditions 6 HISTORY 5 History & Archaeology 5 POLITICAL SCIENCE 5 Political aspects 5 ARCHITECTURE 4 Anthropology 4 Architecture 4 Health & Biological Sciences 4 History and criticism 4 Philosophy 4 Portuguese language 4 Race relations 4 SCIENCE 4 Social sciences 4 Study and teaching 4 Black people 3 History of Education 3 In literature 3 JUVENILE NONFICTION 3 Journalism & Communications 3