Columbia subject headings:
Yeats, W. B. (William Butler), 1865-1939.
Harvard subject headings:
Ireland--In literature.
Yeats, W. B. (William Butler), 1865-1939
Yeats, W. B. (William Butler), 1865-1939--Homes and haunts--Ireland.
Yeats, W. B. (William Butler), 1865-1939--Knowledge--Ireland.
Princeton subject headings:
Yeats, W. B. (William Butler), 1865-1939.