History 58 Biography 31 Politics and government 22 Fiction 20 Civilization 17 Philosophy 13 Description and travel 12 Foreign relations 11 History and criticism 11 Social life and customs 10 Drama 9 Economic conditions 8 World War, 1914-1918 8 Study and teaching 7 English drama 6 Political science 6 Art 5 Police 5 Presidents 5 Amateurs' manuals 4 American drama 4 Authors, American 4 Criticism and interpretation 4 Dictionaries 4 Judges 4 Science 4 Social problems 4 Spanish language 4 Actors 3 Aesthetics 3