Columbia subject headings:
Harvard subject headings:
Iglesias, Pablo, 1850-1925.
P.S.O.E. (Political party)--History.
Socialism--Spain
Socialism--Spain--History
Socialists--Spain--Biography
Unión General de Trabajadores de España--History.
Princeton subject headings:
Iglesias, Pablo, 1850-1925.
P.S.O.E. (Political party)--History.
Socialism--Spain--History.
Socialists--Spain--Biography.
Unión General de Trabajadores de España--History.