Education 12 History 12 PUBLICACIONES PERIODICAS 12 History and criticism 9 Philosophy 9 Social conditions 8 Economic conditions 7 Economic history 7 Indians of South America 7 Antiquities 6 Architecture 4 Ethnology 4 Humanities 4 Social sciences 4 Anthropology 3 Archaeology 3 Biology 3 Civilization 3 Communication 3 Geography 3 International law 3 Literature 3 Mass media 3 Philology 3 Study and teaching 3 Women 3 Zeitschrift 3 Applied linguistics 2 Classical literature 2 Classical philology 2