71. Acoustics. Rating of sound insulation in buildings and of building elements. Airborne sound insulation Part 1, (22nd December 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (36 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
72. BS ISO 7010 AMD117. Graphical symbols. Safety colours and safety signs. Registered safety signs. (6th January 2021) 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) ↗