Columbia subject headings:
Communism--Argentina--History--20th century.
Trotsky, Leon, 1879-1940--Influence.
Harvard subject headings:
Communism--Argentina--History--20th century.
Trotsky, Leon, 1879-1940--Influence.
Princeton subject headings:
Communism--Argentina--History--20th century.
Trotsky, Leon, 1879-1940--Influence.