London bus and Underground timetables : a comprehensive list of bus and Underground timetable books, including those issued by: London Transport 1933-97, London Country 1970-86 : plus all books issued since 1911 by: London General Country Services, East Surrey ; National ; Autocar ; Amersham & district /
Bull, John.
Akehurst, Laurie.
London Historical Research Group.Omnibus Society.
Watford : London Historical Research Group, Omnibus Society,
1998.