1. Specification for phosphor bronze spring washers for general engineering purposes. (8th December 1953) 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) ↗
2. 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) ↗