1. Specification for photographic grade potassium ferricyanide. (28th April 1978) 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. Photography. Processing chemicals. Specifications for potassium ferricyanide. (15th March 1995) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (12 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗