Columbia subject headings:
French drama--20th century--Italian influences--Congresses.
Italian drama--20th century--French influences--Congresses.
Theater--France--Foreign influences--History--20th century--Congresses.
Theater--Italy--Foreign influences--History--20th century--Congresses.
Harvard subject headings:
French drama--20th century--Italian influences--Congresses.
Italian drama--20th century--French influences--Congresses.
Theater--France--Foreign influences--History--20th century--Congresses.
Theater--Italy--Foreign influences--History--20th century--Congresses.
Princeton subject headings:
French drama--20th century--Italian influences--Congresses.
Italian drama--20th century--French influences--Congresses.
Theater--France--Foreign influences--History--20th century--Congresses.
Theater--Italy--Foreign influences--History--20th century--Congresses.