History 80 Economics 63 Literature 63 Climatic changes 46 Management 35 History and criticism 34 Film adaptations 32 Philosophy 31 Adaptation 30 Literature Malayalam 30 Religion 29 Islam 28 Ecology 26 Biography 25 Arts 24 Climate Change Adaptation 24 Social sciences 23 Social Sciences 22 Hinduism 21 Psychology 21 Sociology 21 methods 19 Cytology 18 English literature 18 Marketing 18 Research 18 English fiction 17 Production and operations management--Product management 17 Criticism and interpretation 16 Mathematics 16