1. Specification for blue-black record inks. (31st January 1964) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (11 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Record inks. Specification for permanent inks Part 2, (15th January 1994) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (10 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗