Columbia subject headings:
Portugal--Colonies--Africa--Administration--History--20th century--Sources.
Sao Tome and Principe--History--Autonomy and independence movements--20th century--Sources.
Harvard subject headings:
Carlos, Manuel João da Palma.
Gorgulho, Carlos de Sousa.
Massacres--Sao Tome and Principe--Trindade.
Sao Tome and Principe--History--20th century--Sources.
Princeton subject headings:
Massacres--Sao Tome and Principe--Trindade--Sources.
Sao Tome and Principe--History--20th century--Sources.
Trindade (Sao Tome and Principe)--History--20th century--Sources.