1. Tungsten halogen lamps (non-vehicle). Performance specifications. (31st August 2016) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (262 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Photographic density measurements. Specification for geometric conditions for transmission density Part 2, (15th January 1993) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (14 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗