Columbia subject headings:
Harvard subject headings:
Portugal--Economic conditions--1918-1974.
Portugal--Economic conditions--1974-
Portugal--Politics and government--1910-1974.
Portugal--Politics and government--1974-
Princeton subject headings:
Portugal--Economic conditions--1918-1974.
Portugal--Economic conditions--1974-
Portugal--Politics and government--1910-1974.
Portugal--Politics and government--1974-