History 232 Presidents 56 Politics and government 52 Authors, American 40 Rock musicians 39 Artists 37 Foreign relations 35 History and criticism 34 Journalists 31 African Americans 24 Slaves 24 Statesmen 24 Biography 23 Jazz musicians 21 Social conditions 21 Criticism and interpretation 18 Feminists 18 Blues musicians 16 Composers 16 Photographers 16 Singers 16 Architects 15 Businessmen 15 Civil rights 15 Inventors 15 Motion picture producers and directors 15 Civil rights workers 14 Race relations 14 Economists 13 Painters 13