Columbia subject headings:
Harvard subject headings:
Communist party purges--History--Sources.
Communists--Germany--Biography
Kommunistische Partei Deutschlands--History--Sources.
Wehner, Herbert. 1906---Exile--Russia.
Princeton subject headings:
Communist party purges--History--Sources.
Communists--Germany.
Kommunistische Partei Deutschlands--History--Sources.
Wehner, Herbert, 1906---Exile--Russia.