Columbia subject headings:
Harvard subject headings:
Italy. Esercito--Postal service--History.
Postal service--Italy--History.
Spain--History--Civil War, 1936-1939--Participation, Italian.
Spain--History--Civil War, 1936-1939--Postal service.
Princeton subject headings:
Postal service--Italy--History.
Spain--History--Civil War, 1936-1939--Participation, Italian.
Spain--History--Civil War, 1936-1939--Postal service.