Columbia subject headings:
Harvard subject headings:
Ambassadors--Switzerland--Biography.
Diplomats--Switzerland--Biography.
Frölicher, Hans, 1887-1961.
Germany--History--1933-1945.
Germany--Relations--Switzerland.
Switzerland--Relations--Germany.
Princeton subject headings:
Diplomats--Switzerland--Biography.
Frölicher, Hans, 1887-1961.
Switzerland--Foreign relations.