11. Water quality. Sampling. Guidance on sampling of rivers and streams Part 6, (1st June 2020) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (36 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
12. Water quality. Sampling. Guidance on sampling of rivers and streams Part 6.6, (31st May 1991) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (18 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
13. Water quality. Sampling. Guidance on sampling techniques Part 6-6.2, (31st January 1983) 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) ↗