Columbia subject headings:
Communists--Germany.
Germans--Soviet Union--Correspondence.
Haenisch, Walter.
Political refugees--Soviet Union--Correspondence.
Stammberger, Gabriele, 1910-
Harvard subject headings:
Communists--Germany--Biography
Germans--Soviet Union--Correspondence.
Political refugees--Soviet Union--Correspondence.
Princeton subject headings:
Communists--Germany.
Germans--Soviet Union--Correspondence.
Haenisch, Walter.
Political refugees--Soviet Union--Correspondence.
Stammberger, Gabriele.