Columbia subject headings:
Spain--History--Civil War, 1936-1939--Poetry.
Spain.
Vallejo, César, 1892-1938--Miscellanea.
Harvard subject headings:
Spain
Spain--History--Civil War, 1936-1939--Poetry.
Spain--Poetry.
Vallejo, César, 1892-1938--Criticism and interpretation.
Vallejo, César, 1892-1938--Miscellanea.
Princeton subject headings:
Poetry.
Spain--History--Civil War, 1936-1939--Poetry.
Spain.
Vallejo, César, 1892-1938--Miscellanea.