Columbia subject headings:
Harvard subject headings:
Academic freedom--Portugal.
Censorship--Portugal--History--20th century.
Marques, Alfredo Pinheiro--Censorship.
Portugal--Historiography--Censorship.
Portugal. Comissão Nacional para as Comemorações dos Descobrimentos Portugueses.
Princeton subject headings:
Academic freedom--Portugal.
Censorship--Portugal--History--20th century.
Marques, Alfredo Pinheiro--Censorship.
Portugal--Historiography--Censorship.
Portugal. Comissão Nacional para as Comemorações dos Descobrimentos Portugueses