Columbia subject headings:
Subway stations--England--London.
Harvard subject headings:
London (England)--Buildings, structures, etc.--History.
Subway stations--England--London--History.
Subways--Decoration--England--London.
Subways--England--London--History.
Underground architecture--England--London--History.
Princeton subject headings:
Architecture, Modern--20th century--England--London Metropolitan Area.
London Underground Limited--Buildings.
Subway stations--England--London Metropolitan Area.