Columbia subject headings:
Commercial art--England--London Metropolitan Area--History.
Industrial design--England--London Metropolitan Area--History.
Local transit--England--London Metropolitan Area--History.
Harvard subject headings:
Industrial design--England--London--History--19th century.
Industrial design--England--London--History--20th century.
Local transit--England--London--History.
London (England)
London Transport Board.
London Transport Executive.
Pick, Frank, 1878-1941.
Subways--England--London--History.
Urban transportation--England--London--History.
Princeton subject headings:
Industrial design--England--London--History--19th century.
Industrial design--England--London--History--20th century.
London Regional Transport (Agency)