Columbia subject headings:
Journalism--Paraguay--History--19th century.
Journalism--Paraguay--History--20th century.
Press and politics--Paraguay--History--19th century.
Press and politics--Paraguay--History--20th century.
Harvard subject headings:
Journalism--Paraguay--History--19th century.
Journalism--Paraguay--History--20th century.
Press--Paraguay--History--19th century.
Press--Paraguay--History--20th century.
Princeton subject headings: