London transport's Jubilee line may get chopper trains in 1983
By: (Anon.).
Publisher: IPC Transport Press
Published: 1978
Place of publication: (London
Language: eng
Number of pages: 390
Notes: An illustrated extract from Railway gazette international, vol. 134, no. 6, June 1978.

The new stock, at present under test, has chopper control of traction power.