1. Methods of testing refractory materials. General and textural properties. Determination of permeability to gases (method 1902-309) Part 3-3.9, (29th May 1981) 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) ↗
2. Specification for multifunctional gas controls for domestic, commercial and catering appliances. (27th February 1981) 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) ↗