Columbia subject headings:
Harvard subject headings:
Communism--Germany--History
Communists--Germany--Biography
Germany--History
Historians--Germany--Biography
Mehring, Franz, 1846-1919
Socialism--Germany--History
Sozialdemokratische Partei Deutschlands--History.
Princeton subject headings:
Communism--Germany--History.
Communists--Germany--Biography.
Germany--History.
Historians--Germany--Biography.
Mehring, Franz, 1846-1919.
Socialism--Germany--History.
Sozialdemokratische Partei Deutschlands--History.