1. Specification for Edison screw lampholders. (1st August 1989) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (67 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Edison screw lampholders. (13th October 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (94 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
3. Edison screw lampholders. (31st March 2022) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (102 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗