Columbia subject headings:
Authors, Spanish--19th century--Political and social views.
Authors, Spanish--20th century--Political and social views.
Politics and literature--Spain--History--19th century.
Politics and literature--Spain--History--20th century.
Spanish literature--19th century--History and criticism.
Spanish literature--20th century--History and criticism.
Harvard subject headings:
Authors, Spanish--19th century--Political and social views.
Authors, Spanish--20th century--Political and social views.
Politics and literature--Spain--History--19th century.
Politics and literature--Spain--History--20th century.
Spanish literature--19th century--History and criticism
Spanish literature--20th century--History and criticism
Princeton subject headings:
Authors, Spanish--19th century--Political and social views.
Authors, Spanish--20th century--Political and social views.
Politics and literature--Spain--History--19th century.
Politics and literature--Spain--History--20th century.
Spanish literature--19th century--History and criticism.
Spanish literature--20th century--History and criticism.