History 56 Tourism 53 Environmental ecology-- Island ecology-- Desert Ecology 40 History and criticism 36 Destination planning and management tourism 25 English literature 23 Philosophy 23 Women 23 Literature 20 Deserts 19 Ecology 19 Conservation and restoration 18 English drama 18 Restoration ecology 17 Social aspects 16 Drama 15 Sex 15 Sex role 15 Tourism and Travel 15 Leisure, Recreation and Tourism Economics, (New March 2000) 14 Literature English 14 Biography 13 Destinations 13 English fiction 13 Social conditions 13 Social Sciences 12 Economics 11 Globalization 11 India 11 Sustainable tourism 11