Columbia subject headings:
Harvard subject headings:
Reuter, Ernst, 1889-1953--Travel--United States.
United States--Description and travel.
United States--History--1945-1953.
Princeton subject headings:
Berlin (Germany)--Foreign relations--United States.
Berlin (Germany)--History--Blockade, 1948-1949.
Mayors--Germany--Berlin--Biography.
Reuter, Ernst, 1889-1953--Travel--United States.
United States--Foreign relations--Germany--Berlin.