Columbia subject headings:
Spain--History--Civil War, 1936-1939.
Unamuno, Miguel de, 1864-1936--Political and social views.
Unamuno, Miguel de, 1864-1936. Resentimiento trágico de la vida.
Harvard subject headings:
Spain--History--Civil War, 1936-1939
Unamuno, Miguel de, 1864-1936--Political and social views.
Unamuno, Miguel de, 1864-1936. Resentimiento trágico de la vida.
Princeton subject headings:
Spain--History--Civil War, 1936-1939.