1. Method for magnetic particle flaw detection. (27th February 1981) 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) ↗
2. Methods for specifying and measuring the characteristics of sound system equipment. Programme level meters Part 9, (30th October 1981) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (23 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗