Columbia subject headings:
Synge, J. M. (John Millington), 1871-1909.
Yeats, W. B. (William Butler), 1865-1939.
Harvard subject headings:
English drama--Irish authors--History and criticism
Ireland--In literature.
O'Casey, Sean, 1880-1964
Synge, J. M. (John Millington), 1871-1909
Yeats, W. B. (William Butler), 1865-1939
Princeton subject headings: