Bibliography
- Bruce, J. Graeme (1987). Workhorses of the London Underground. Capital Transport Publishing. ISBN 0-904711-87-0.
- Glover, John (1991). London's Underground (7th ed.). Ian Allan Ltd. ISBN 0-7110-1899-5.
- Hardy, Brian (1993). London Underground Rolling Stock (13th ed.). Capital Transport Publishing. ISBN 978-1-85414-164-4.
Read more about this topic: London Underground Battery-electric Locomotives