Columbia subject headings:
Diplomats--Biography.
Diplomats--Correspondence.
Germany--Foreign relations--1918-1933.
Germany--Foreign relations--1933-1945.
World politics.
Harvard subject headings:
Princeton subject headings:
Diplomats--Correspondence, reminiscences, etc.
Germany--Foreign relations--1918-1933.
Germany--Foreign relations--1933-1945.
World politics.