1. Specification for protractors for drawing office use. (31st January 1975) 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) ↗
2. Unplasticized polyvinyl chloride (PVC-U) rainwater goods and accessories. Half-round gutters and circular pipe Part 1, (1st February 1971) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (33 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗