Columbia subject headings:
Partido Socialista (Argentina)--History.
Political parties--Argentina--History.
Socialism--Argentina--History.
Harvard subject headings:
Partido Socialista (Argentina)--History.
Political parties--Argentina--History
Socialism--Argentina
Socialism--Argentina--History
Princeton subject headings:
Partido Socialista (Argentina)--History.
Political parties--Argentina--History.
Socialism--Argentina--History.