Columbia subject headings:
Architecture--England--London--Guidebooks.
London (England)--Buildings, structures, etc.--Guidebooks.
London (England)--Guidebooks.
Harvard subject headings:
Architecture--England--London--Guidebooks.
Guidebooks
London (England)--Buildings, structures, etc.--Guidebooks.
London (England)--Guidebooks.
Princeton subject headings:
Architecture--England--London--Guidebooks.
Guidebooks.
London (England)--Buildings, structures, etc.--Guidebooks.
London (England)--Guidebooks.