History 31 Neuro endocrinology 26 Philosophy 26 Literature 20 Foreign trade regulation 16 Iterative methods (Mathematics) 15 History and criticism 14 Fiction 13 Research 12 Euro 11 Heroes in literature 11 Macroeconomics 11 Novel 11 Arts 10 Heroes 10 Law and legislation 10 African Americans 9 Criticism 9 Dissertations, Academic (Ph.D) 9 English literature 9 Management 9 Psychology 9 Schools of economic thought-- Economics 9 Education 8 Forests 8 Forests and Forest Trees (Biology and Ecology) 8 Literature English 8 Sociology 8 American literature 7 Biochemistry 7