1. Specification for buttress threads. (17th August 1950) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (26 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Specification for cycle (B.S.C.) threads (formerly known as C.E.I. threads). (24th May 1950) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (24 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗