Columbia subject headings:
Aesthetics, Modern--19th century.
Aesthetics, Modern--20th century.
Art, Modern--19th century.
Art, Modern--20th century.
Harvard subject headings:
Aesthetics, Modern--19th century.
Aesthetics, Modern--20th century.
Art, Modern--19th century
Art, Modern--20th century
Princeton subject headings:
Aesthetics, Modern--19th century.
Aesthetics, Modern--20th century.
Art, Modern--19th century.
Art, Modern--20th century.