History 167 Biography 55 Social conditions 55 Politics and government 52 Education 43 Minorities 33 English language 30 Social life and customs 30 Civilization 28 Foreign relations 27 Psychology 22 Intellectual life 21 History and criticism 20 American literature 19 Social aspects 18 Women 18 Youth 18 Americanisms 17 Psychological aspects 17 United States 17 Fiction 16 Marriage 16 Race relations 16 Sources 16 Law and legislation 15 Adolescence 14 Social problems 14 Special education 14 Case studies 13 Child rearing 13