Columbia subject headings:
Harvard subject headings:
Bahro, Rudolf, 1935-
Communism--Germany (East)--History
Harich, Wolfgang.
Havemann, Robert.
Marxist criticism--Germany (East)--History.
Utopian socialism--Germany (East)--History.
Princeton subject headings:
Bahro, Rudolf, 1935-
Dissenters--Germany (East)--Biography.
Harich, Wolfgang.
Havemann, Robert.
Intellectuals--Germany (East)--Biography.