Columbia subject headings:
Art--Themes, motives--Methodology--Congresses.
Signs and symbols--Methodology--Congresses.
Harvard subject headings:
Art--Themes, motives--Methodology--Congresses.
Signs and symbols--Methodology--Congresses.
Princeton subject headings:
Art--Themes, motives--Methodology--Congresses.
Signs and symbols--Methodology--Congresses.