11. Ophthalmic optics. Spectacle frames. Measuring system and vocabulary. (13th July 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (24 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
12. Optics and optical instruments. Ophthalmic optics. Measuring system for spectacle frames. (28th February 1992) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (10 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
13. Optics and optical instruments. Ophthalmic optics. Screw threads. (15th June 1995) 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) ↗
14. Optics and optical instruments. Opthalmic optics. Marking of spectacle frames. (28th February 1992) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (10 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
15. Tracked Changes. Eye and face protection. Sunglasses and related eyewear. Sunglasses for general use Part 1, (16th January 2023) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (100 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗