Columbia subject headings:
Iglesias Pantín, Santiago, 1872-1939.
Labor unions--Puerto Rico--Biography.
Socialists--Puerto Rico--Biography.
Statesmen--Puerto Rico--Biography.
Harvard subject headings:
Iglesias Pantín, Santiago, 1872-1939.
Labor unions--Puerto Rico--Biography.
Socialists--Puerto Rico--Biography.
Statesmen--Puerto Rico--Biography.
Princeton subject headings:
Iglesias Pantín, Santiago, 1872-1939.
Labor unions--Puerto Rico--Biography.
Socialists--Puerto Rico--Biography.
Statesmen--Puerto Rico--Biography.