Columbia subject headings:
Arts, Modern--Congresses.
Space (Architecture)--Congresses.
Space (Art)--Congresses.
Theaters--Stage-setting and scenery--Congresses.
Harvard subject headings:
Arts, Modern--Congresses
Space (Architecture)--Congresses
Space (Art)--Congresses.
Theaters--Stage-setting and scenery--Congresses.
Princeton subject headings: