Columbia subject headings:
Harvard subject headings:
Allied Commission for Bulgaria.
Bulgaria--Foreign relations--United States
United States--Foreign relations--1933-1945.
United States--Foreign relations--1945-1953.
United States--Foreign relations--Bulgaria.
World War, 1939-1945--Bulgaria.
Princeton subject headings:
Allied Control Commission--History.
Bulgaria--Military relations--United States.
Military assistance, American--Bulgaria.