Columbia subject headings:
Communism--Germany (East)
Communism--Soviet Union.
Communists--Germany (East)--Biography.
Leonhard, Wolfgang.
Harvard subject headings:
Communism--Germany (East)
Communism--Germany (East)--Biography.
Communism--Soviet Union
Communism--Soviet Union--Study and teaching
Communists--Germany (East)--Biography
Leonhard, Wolfgang
Princeton subject headings:
Communism--Germany (East)
Communism--Soviet Union--Study and teaching.
Leonhard, Wolfgang.