11. Specification for general requirements for equipment for use in aircraft. All equipment. Magnetic influence Part 2.2, (14th June 1972) 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) ↗
12. Tracked Changes. Ships and marine technology. Marine electromagnetic compasses. (17th May 2022) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (54 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗