Columbia subject headings:
Diplomats--Biography.
Europe--Politics and government--1871-1918.
Germany--Foreign relations--1871-
Harvard subject headings:
Diplomats--Biography
Diplomats--Correspondence
Diplomats--Correspondence, reminiscences, etc.
Europe--Politics and government--1871-1918.
Germany--Foreign relations--1871-
Princeton subject headings:
Diplomats--Correspondence, reminiscences, etc.
Europe--Politics and government--1871-1918.
Germany--Foreign relations--1871-