1. Graphical symbols for electrical power, telecommunications and electronics diagrams. Switchgear, controlgear and protective devices Part 7, (28th June 1985) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (32 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Graphical symbols for electrical power, telecommunications and electronics diagrams. Guide for binary logic elements Part 12, (30th August 1991) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (248 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
3. Graphical symbols for diagrams. Switchgear, controlgear and protective devices Part 7, (15th December 1996) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (64 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗