Columbia subject headings:
Harvard subject headings:
Diplomats--Germany (East)--Biography.
Germany (East)--Foreign relations--Germany (West)
Germany (West)--Foreign relations--Germany (East)
Seidel, Karl, 1930-
Princeton subject headings:
Diplomats--Germany (East)--Biography.
Germany (East)--Foreign relations--Germany (West)
Germany (West)--Foreign relations--Germany (East)
Seidel, Karl, 1930-