Columbia subject headings:
Art--Collectors and collecting--Netherlands--History--20th century.
Art--Economic aspects--Netherlands--History--20th century.
Art--Netherlands--Marketing--History--20th century.
Harvard subject headings:
Art--Collectors and collecting--Netherlands--History--20th century.
Art--Economic aspects--Netherlands--History--20th century.
Art--Netherlands--Marketing--History--20th century.
Princeton subject headings:
Art--Collectors and collecting--Netherlands--History--20th century.
Art--Economic aspects--Netherlands--History--20th century.
Art--Netherlands--Marketing--History--20th century.