Columbia subject headings:
Comparative literature--Italian and Spanish.
Comparative literature--Spanish and Italian.
Guillén, Jorge, 1893-1984--Criticism and interpretation.
Poetics.
Ungaretti, Giuseppe, 1888-1970--Criticism and interpretation.
Harvard subject headings:
Guillén, Jorge, 1893-1984--Criticism and interpretation.
Ungaretti, Giuseppe, 1888-1970--Criticism and interpretation.
Princeton subject headings: