1. Methods of testing water used in industry. Nitrite, nitrate and ammonia (free, saline and albuminoid) Part 7, (30th August 1968) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (22 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
2. Routine control methods of testing water used in industry. (1st February 1968) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (54 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗