Columbia subject headings:
Bebel, August, 1840-1913.
Socialism--Germany--History.
Socialists--Germany--Biography.
Sozialdemokratische Partei Deutschlands--History.
Working class--Germany--Biography.
Harvard subject headings:
Bebel, August, 1840-1913
Socialism--Germany
Socialism--Germany--History
Socialists--Germany--Biography
Sozialdemokratische Partei Deutschlands--History.
Working class--Germany--Biography.
Princeton subject headings: