United States 964 History 678 Solid state physics; Properties of matter 268 Education 263 Politics and government 259 India 240 Economics 200 Sales management 191 Foreign relations 172 Social Sciences 163 Agriculture 156 Solid state physics 139 Political science 126 Politics 122 Social aspects 113 Democracy 110 International relations 107 Social conditions 104 Women 104 United states 103 Management 101 State 101 History and criticism 100 Political aspects 98 Law 96 State, The 96 Customer relations management--Sales management--CRM 95 Law and legislation 94 Philosophy 94 Government 91