History 31 American literature 10 History and criticism 9 Criticism and interpretation 8 In literature 8 English poetry 7 Biography 6 Yeats, W. B. (William Butler), 1865-1939 5 African Americans 4 Intellectual life 4 Plantation life 4 Poets, Irish 4 World War, 1914-1918 4 Authors, English 3 Chemistry 3 Colonialism 3 Criticism 3 Dissertations, Academic (Ph.D) 3 Ethnic Groups 3 History, 19th Century 3 History, 20th Century 3 Medicine 3 National characteristics, American, in literature 3 Public Health 3 Public health 3 Social Environment 3 Social aspects 3 Social medicine 3 Study and teaching 3 United States 3