Columbia subject headings:
Harvard subject headings:
Neutrality--Portugal--History--20th century.
Portugal--Foreign relations--1933-1974
Salazar, António de Oliveira, 1889-1970
World War, 1939-1945--Diplomatic history
World War, 1939-1945--Portugal
Princeton subject headings:
Neutrality--Portugal--History--20th century.
Portugal--Foreign relations--1933-1974.
Salazar, António de Oliveira, 1889-1970.
World War, 1939-1945--Diplomatic history.
World War, 1939-1945--Portugal.