1. Photographic flash equipment. Method for determination of flash guide numbers Part 6, (31st March 1980) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (4 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Photography. Electronic flash equipment. Determination of light output and performance. (15th October 1995) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (16 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
3. Photography. Determination of flash guide numbers. (15th August 1995) 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) ↗