Columbia subject headings:
Art appreciation.
Art, Modern--20th century--Economic aspects.
Art, Modern--21st century--Economic aspects.
Art--Marketing--History--20th century.
Art--Marketing--History--21st century.
Harvard subject headings:
Art appreciation
Art, Modern--20th century--Economic aspects.
Art, Modern--21st century--Economic aspects.
Art--Marketing--History--20th century.
Art--Marketing--History--21st century.
Princeton subject headings: