Columbia subject headings:
Harvard subject headings:
Democratization--Portugal--History--Congresses.
Portugal--Politics and government--1974---Congresses.
Portugal--Social conditions--20th century--Congresses.
Portugal--Social conditions--21st century--Congresses.
Princeton subject headings:
Democratization--Portugal--History--Congresses.
Portugal--Politics and government--1974---Congresses.
Portugal--Social conditions--20th century--Congresses.
Portugal--Social conditions--21st century--Congresses.