History 114 Power (Social sciences) 109 Folk Lore; English Folk Lore 94 Power resources 72 Korea 70 Biography 49 Mathematics 47 Power 40 Physics 39 Lecture Notes in Pure and Applied Mathematics 38 Engineering 33 Collected works 32 India 32 Political questions and judicial power 31 Dissertations, Academic (Ph.D) 28 Politics and government 28 English poetry 27 International relations 26 Philosophy 26 Balance of power 24 Judicial power 24 Mathematical analysis 23 Political science 23 Quantum theory 23 Criticism and interpretation 22 Power electronics 22 Economics 21 Social Sciences 21 Law 20 Nuclear power 20