Columbia subject headings:
Harvard subject headings:
Freund, Michael, 1902-1972--Correspondence.
Gayk, Andreas--Correspondence.
Political scientists--Germany--Correspondence.
Politicians--Germany--Correspondence.
Princeton subject headings:
Freund, Michael, 1902-1972--Correspondence.
Gayk, Andreas--Correspondence.
Political scientists--Germany--Correspondence.
Politicians--Germany--Correspondence.