11. Transportable gas container valves. Valves with taper stems for use with breathing apparatus Part 2, (19th March 1963) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (26 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
12. Transportable gas container valves. Valves with taper stems (excluding valves used for breathing and medical purposes) Part 1, (17th October 1962) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (46 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗