1. Coaxial cables. Generic specification Part 1, (10th April 2019) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (18 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. The Office of Communications Annual Report & Accounts for the period 1 April 2018 to 31 March 2019. ([2019-07-11]) Other Names: Great Britain., Office of Communications. Record Type: Book Extent: 1 online resource (168 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗