Columbia subject headings:
British Information Services--Directories.
Great Britain--Bibliography.
Great Britain--Study and teaching--Audio-visual aids--Catalogs.
Reference books--Great Britain--Bibliography.
Harvard subject headings:
Great Britain--Bibliography.
Great Britain--Information services--Directories.
Great Britain--Reference books--Bibliography.
Great Britain--Study and teaching--Audio-visual aids--Catalogs.
Princeton subject headings:
Great Britain--Bibliography.
Great Britain--Information services--Directories.
Great Britain--Study and teaching--Audio-visual aids--Catalogs.
Reference books--Great Britain--Bibliography.