Columbia subject headings:
Harvard subject headings:
Dublin (Ireland)--In literature.
Music in the theater.
O'Casey, Sean, 1880-1964--Knowledge--Music.
Songs, English--Ireland
Songs, English.
Princeton subject headings:
Dublin (Ireland)--In literature.
Music in the theater.
O'Casey, Sean, 1880-1964--Knowledge--Music.
Songs, English--Ireland.
Songs, English.