Columbia subject headings:
Poetry, Modern--20th century--History and criticism.
Spain--History--Civil War, 1936-1939--Literature and the war.
Harvard subject headings:
Poetry, Modern--20th century--History and criticism
Spain--History--Civil War, 1936-1939--Literature and the war.
Princeton subject headings:
Poetry, Modern--20th century--History and criticism.
Spain--History--Civil War, 1936-1939--Literature and the war.