Columbia subject headings:
Harvard subject headings:
Authors, Irish--20th century--Political and social views.
English literature--Irish authors--History and criticism
Literature and revolutions--Ireland.
Yeats, W. B. (William Butler), 1865-1939--Political and social views.
Princeton subject headings:
Politics and literature--Ireland--History--20th century.
Yeats, W. B. (William Butler), 1865-1939--Political and social views.