Columbia subject headings:
Censorship--Spain--History--20th century.
Freedom of the press--Spain--History--20th century.
Journalism--Censorship--Spain--History--20th century.
Harvard subject headings:
Censorship--Spain--History--20th century.
Freedom of the press--Spain--History--20th century.
Journalism--Censorship--Spain--History--20th century.
Princeton subject headings:
Censorship--Spain--History--20th century.
Freedom of the press--Spain--History--20th century.
Journalism--Spain--History--20th century.