1. Graphical symbols for components of servo-mechanisms. Transductors and magnetic amplifiers Part 1, (25th May 1960) 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. Graphical symbols for electrical power, telecommunications and electronics diagrams. Production and conversion of electrical energy Part 6, (28th June 1985) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (20 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗