History 234 African Americans 47 Civilization 36 Folklore 31 Social life and customs 24 Tales 20 Women 20 更多 ... Description and travel 19 Politics and government 19 Biography 17 Manners and customs 17 Children 15 Civil rights 15 Indians of North America 15 Social conditions 15 Presidents 14 World War, 1939-1945 13 Slavery 12 Antiquities 10 Children's stories, Chinese 10 Race relations 10 Civil rights movements 9 Almanacs, American 8 History and criticism 8 Holocaust, Jewish (1939-1945) 8 Physicists 8 Social aspects 8 Teenagers 8 Childhood and youth 7 Discovery and exploration 7 少 ...