Columbia subject headings:
Harvard subject headings:
De Bunsen, Maurice William Ernest, Sir, 1852-1932.
De Bunsen, Maurice, 1852-1932.
Great Britain--Foreign relations--1837-1901.
Great Britain--Foreign relations--20th century.
Princeton subject headings:
De Bunsen, Maurice William Ernest, Sir, 1852-1932.
Great Britain--Foreign relations--1837-1901.
Great Britain--Foreign relations--1901-1910.
Great Britain--Foreign relations--1910-1936.