Columbia subject headings:
Communism--Germany (East)
Communists--Germany (East)
Havemann, Robert--Bibliography.
Harvard subject headings:
Communism--Germany (East)--Bibliography.
Communists--Germany (East)--Bibliography.
Havemann, Robert--Bibliography.
Princeton subject headings:
Communism--Germany (East)
Communists--Germany (East).
Havemann, Robert--Bibliography.