Columbia subject headings:
Cuba--Politics and government--1909-1933.
Mella, Julio Antonio, 1903-1929.
Harvard subject headings:
Communists--Cuba--Biography.
Labor unions--Cuba--History.
Labor unions--Cuba--Officials and employees--Biography.
Mella, Julio Antonio, 1903-1929.
Student movements--Cuba--History.
Princeton subject headings:
Communists--Cuba--Biography.
Labor unions--Cuba--History.
Labor unions--Cuba--Officials and employees--Biography.
Mella, Julio Antonio, 1903-1929.
Student movements--Cuba--History.