Columbia subject headings:
Harvard subject headings:
Demonstrations--Portugal--Lisbon--History--21st century.
Education and state--Portugal--History--21st century.
Teachers--Political activity--Portugal--History--21st century.
Princeton subject headings:
Financial crises--Portugal--History--21st century.
Professional employees--Political activity--Portugal.
Protest movements--Portugal--History--21st century.
Social movements--Portugal--History--21st century.