1. Specification for capacitors for railway signalling track circuits. (28th February 1961) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (12 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Specification for transformers for use in ships. (31st July 1961) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (54 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗