Columbia subject headings:
Harvard subject headings:
La Vanguardia, Buenos Aires.
Press, Labor--Argentina--History.
Press, Socialist--Argentina--History.
Socialism--Argentina--Periodicals.
Socialists--Argentina--Biography
Vanguardia (Buenos Aires, Argentina : 1894)
Working class--Argentina--Periodicals.
Princeton subject headings:
Vanguardia (Buenos Aires, Argentina : 1962)