Columbia subject headings:
Harvard subject headings:
Berlin (Germany)--Social conditions--20th century--Sources.
Berlin Wall, Berlin, Germany, 1961-1989
Germany (East)--History--Sources.
Germany (West)--History--Sources.
Kaczmarek, Norbert--Correspondence.
Kaczmarek, Norbert--Family.
Political scientists--Germany--Berlin--Correspondence.
Princeton subject headings:
Berlin (Germany)--Social conditions--20th century--Sources.
Berlin Wall, Berlin, Germany, 1961-1989.
Germany (East)--History--Sources.
Germany (West)--History--Sources.
Kaczmarek, Norbert, 1942---Correspondence.
Kaczmarek, Norbert, 1942---Family.
Political scientists--Germany--Berlin--Correspondence.