Columbia subject headings:
British Library--Catalogs--Bibliography.
British Library--Handbooks, manuals, etc.--Bibliography.
Harvard subject headings:
British Library--Catalogs--Bibliography.
British Library--Handbooks, manuals, etc.--Bibliography.
Library catalogs
Princeton subject headings:
British Library--Catalogs--Bibliography.
British Library--Handbooks, manuals, etc.--Bibliography.
Library resources--England--London--Bibliography.