Columbia subject headings:
Harvard subject headings:
Art, Modern--Congresses.
Arts, Modern--Congresses
Arts--Philosophy--Congresses
Performing arts--21st century--Congresses.
Theater--21st century--Congresses.
Princeton subject headings:
Art, Modern--Congresses.
Arts, Modern--Congresses.
Arts--Philosophy--Congresses.
Performing arts--21st century--Congresses.
Theater--21st century--Congresses.