1. Specification for cooker control units rated at 30 amperes and 45 amperes 250 volts single-phase only. (30th November 1977) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (41 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Specification for graphical symbols used on diagrams for fluid power systems and components. (29th April 1977) 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) ↗