Columbia subject headings:
Art.
Pérez de Ayala, Ramón, 1880-1962--Aesthetics.
Pérez de Ayala, Ramón, 1880-1962--Knowledge and learning.
Harvard subject headings:
Art, Spanish--20th century.
Art, Spanish.
Pérez de Ayala, Ramón, 1880-1962
Pérez de Ayala, Ramón, 1880-1962--Aesthetics.
Pérez de Ayala, Ramón, 1880-1962--Knowledge--Art.
Princeton subject headings:
Art, Spanish.
Art--Spain.