51. Personal eye-protection equipment. Filters and eye-protectors against laser radiation (laser eye-protectors). (31st March 2017) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (32 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
52. Photographic density measurements. Guide for terms, symbols and notations Part 1, (28th June 1985) 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) ↗
53. 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) ↗
54. Photographic density measurements. Specification for geometric conditions for transmission density Part 2, (29th August 1986) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (8 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
55. Photography. Density measurements. Spectral conditions Part 3, (15th February 1996) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (28 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
56. Plastics. Determination of the total luminous transmittance of transparent materials. Double-beam instrument Part 2, (30th June 2021) 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) ↗
57. Plastics. Determination of the total luminous transmittance of transparent materials. Single-beam instrument Part 1, (15th January 1997) 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) ↗
58. Plastics. Determination of total luminous transmittance and reflectance. (6th May 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (20 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
59. Plastics. Poly(methyl methacrylate) double- and triple-skin sheets. Test methods. (29th July 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (30 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
60. Poly(methyl methacrylate) sheets. Types, dimensions and characteristics. Melt-caldendered extruded sheets Part 2, (15th March 1997) 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) ↗