Columbia subject headings:
Harvard subject headings:
Communication--Argentina--History--18th century.
Communication--Argentina--History--19th century.
Journalism--Argentina--History--18th century.
Journalism--Argentina--History--19th century.
Journalism--Rio de la Plata Region (Argentina and Uruguay)--History--18th century.
Princeton subject headings:
Communication--Argentina--History--18th century.
Communication--Argentina--History--19th century.
Journalism--Argentina--History--19th century.
Journalism--Rio de la Plata Region (Argentina and Uruguay)--History--18th century.