History 77 Dissertations, Academic (Ph.D) 48 International agencies 45 Women 41 India 40 Patent laws and legislation 38 Mass media 31 Literature 30 Travel Management --Travel agency and tour operations managmenet 29 Law and legislation 28 Politics and government 27 Economics 25 Human rights 25 Research 25 Tourism travel--Travel Management --Travel agency and tour operations managmenet 25 Natural enemies 24 Biological control agents 23 Education 23 Feminism 23 Plant Pests, (New March 2000) 23 Biological Control 22 Biological control 22 Microbiology 22 Pharmacology and Toxicology 22 Social Sciences 22 Attention 21 Plant pests 21 Social aspects 21 Constitutional law 20 Economic development 20