Columbia subject headings:
Harvard subject headings:
Argentina--Politics and government--20th century.
Federación Obrera Regional Argentina--Biography.
Political refugees--Argentina--Biography.
Political refugees--Spain--Biography
Riera Díaz, Laureano, 1908-
Social reformers--Argentina--Biography.
Princeton subject headings:
Argentina--Politics and government--20th century.
Argentina--Social conditions.
Poor--Argentina.
Riera Díaz, Laureano.
Social reformers--Argentina--Biography.