Columbia subject headings:
Art, Modern--19th century.
Art, Modern--20th century.
Impressionism (Art)
Harvard subject headings:
Art, Modern--19th century
Art, Modern--20th century
Impressionism (Art)
Painting, Modern--19th century
Painting, Modern--20th century
Post-impressionism (Art)
Princeton subject headings:
Impressionism (Art)
Painting, Modern--19th century.
Painting, Modern--20th century.