Principles of Locating Electrical Signalling Failures D.C. Track Circuits
- Made:
- 1960
- maker:
- British Transport Films and
- British Railways
Lecture notes for a filmstrip in 74 frames, monochrome, made by British Transport Films in association with the Signal Engineering Department of British Railways entitled 'Principles of Locationg Electrical Signalling Failures D.C. Track Circuits', c1960.
