Columbia subject headings:
Aesthetics, Modern.
Art--Philosophy.
Philosophy, Modern.
Simmel, Georg, 1858-1918.
Sociology--Philosophy.
Harvard subject headings:
Aesthetics, Modern.
Art--Philosophy
Philosophy, Modern.
Simmel, Georg, 1858-1918
Sociology--Philosophy
Princeton subject headings:
Aesthetics, Modern.
Art--Philosophy.
Philosophy, Modern.
Simmel, Georg, 1858-1918.
Sociology--Philosophy.