. "'''Green Line'''" . . . . . . . . . . . . . . . . "London Passenger Transport Board" . . . . . . . . . . . . . . . . . "London Passenger Transport Act 1933" . . . . . . "London Transport" . . . . . . . . . . . . . . . . . . . "London Passenger Transport Area" . . . . "1933" . . . "LPTB" . . . . "London Passenger Transport Board (LPTB)" . "Dissolved" . . "London Passenger Transport" . . . . "London Passenger Transport Board" . . . . . "London Transport Police" . . . . . . . . "Transport authority" .