Columbia subject headings:
Harvard subject headings:
Great Britain--Foreign relations--Sources.
Great Britain. Foreign Office--Records and correspondence.
Princeton subject headings:
Catalogs.
Great Britain--Foreign relations--1760-1820--Sources--Bibliography--Catalogs.
Great Britain--Foreign relations--19th century--Sources--Bibliography--Catalogs.
Great Britain--Foreign relations--20th century--Sources--Bibliography--Catalogs.
Great Britain. Foreign Office--Archives--Catalogs.
Great Britain. Public Record Office--Catalogs.