Columbia subject headings:
Harvard subject headings:
Lisbon (Portugal)
Neutrality--Portugal--Lisbon--History--20th century.
World War, 1939-1945--Social aspects--Portugal--Lisbon.
Princeton subject headings:
Lisbon (Portugal)--History--20th century.
Neutrality--Portugal--History--20th century.
World War, 1939-1945--Social aspects--Portugal--Lisbon.