Columbia subject headings:
Ayala, Francisco, 1906-2009.
Spanish literature--20th century.
Spanish literature--History and criticism.
Harvard subject headings:
Ayala, Francisco, 1906-2009
Spanish literature--20th century
Spanish literature--History and criticism
Princeton subject headings:
Ayala, Francisco, 1906-2009.
Spanish literature--20th century.
Spanish literature--History and criticism.