Columbia subject headings:
English drama--Irish authors--Appreciation--Poland.
English drama--Irish authors--History and criticism.
Irish drama--20th century--History and criticism.
Theater--Poland--History--20th century.
Harvard subject headings:
English drama--Irish authors--Appreciation--Poland.
English drama--Irish authors--History and criticism
Irish drama--20th century--History and criticism.
Theater--Poland--History--20th century.
Princeton subject headings:
English drama--Irish authors--Appreciation--Poland.
English drama--Irish authors--History and criticism.
Irish drama--20th century--History and criticism.
Theater--Poland--History--20th century.