Columbia subject headings:
Sao Tome and Principe--History--20th century.
Sao Tome and Principe--Politics and government--20th century.
Harvard subject headings:
Sao Tome and Principe--History--20th century.
Sao Tome and Principe--Politics and government--20th century.
Princeton subject headings:
Movimento de Libertação de São Tomé e Príncipe/Partido Social-Democrata.
Nationalism--Sao Tome and Principe.
Sao Tome and Principe--Politics and government.