History 521 Philosophy 154 History and criticism 146 Social aspects 134 Management 129 Politics and government 111 Construction industry 102 Economics 76 Social conditions 75 Economic conditions 70 Building 67 Research 64 Social sciences 54 Sociology 51 Civilization 50 Methodology 49 English literature 47 Economic policy 45 Culture 43 Economic aspects 43 Ecology 41 Historiography 41 Political science 41 Finance 39 Criticism and interpretation 37 Political aspects 37 English language 36 Geography 36 Construction contracts 35 Study and teaching 35