Columbia subject headings:
Harvard subject headings:
Madeira Islands--Politics and government--20th century.
Madeira Islands--Politics and government--21st century.
Opposition (Political science)--Madeira Islands.
Partido Social-Democrata (Portugal)
Princeton subject headings:
Madeira Islands--Politics and government--20th century.
Madeira Islands--Politics and government--21st century.
Opposition (Political science)--Madeira Islands.
Partido Social-Democrata (Portugal)