Columbia subject headings:
Drama--21st century--History and criticism--Congresses.
European drama--21st century--History and criticism--Congresses.
Theater--21st century--Congresses.
Theater--Europe--21st century--Congresses.
Harvard subject headings:
Drama--21st century--History and criticism--Congresses.
European drama--21st century--History and criticism--Congresses.
Theater--21st century--Congresses.
Theater--Europe--21st century--Congresses.
Princeton subject headings:
Drama--21st century--History and criticism--Congresses.
European drama--21st century--History and criticism--Congresses.
Theater--21st century--Congresses.
Theater--Europe--21st century--Congresses.