Columbia subject headings:
Aesthetics, Modern--20th century.
Aesthetics, Modern--21st century.
Art, Modern--20th century.
Art, Modern--21st century.
Visual perception.
Harvard subject headings:
Aesthetics, Modern--20th century.
Aesthetics, Modern--21st century.
Art, Modern--20th century
Art, Modern--21st century
Duchamp, Marcel, 1887-1968--Criticism and interpretatiom.
Duchamp, Marcel, 1887-1968--Criticism and interpretation.
Visual perception
Princeton subject headings:
Aesthetics, Modern--20th century.
Aesthetics, Modern--21st century.
Art, Modern--20th century.
Art, Modern--21st century.
Visual perception.