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