Columbia subject headings:
Communism and science.
Labor movement--Argentina--History--19th century.
Labor movement--Argentina--History--20th century.
Socialism and education--Argentina--History--19th century.
Socialism and education--Argentina--History--20th century.
Sociedad "Luz" (Universidad Popular (Buenos Aires, Argentina))
Working class--Education--Argentina--History--19th century.
Working class--Education--Argentina--History--20th century.
Harvard subject headings:
Science news--Argentina--History--20th century.
Science--Argentina--Information services--History--20th century.
Sociedad Luz (Argentina)--History--20th century.
Princeton subject headings: