26 | Assessment of the nutrient status and associated algal productivity of Malham Tarn, Yorkshire
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27 | Greatham Creek tidal defences inter regional review : prepared for the purposes of legal proceedings |
28 | The Natural (Baseline) Quality of Groundwaters in England and Wales - Magnesium Limestone of Yorkshire and Northumbria |
29 | The faunal richness of headwater streams. Stage 3 : impact of agricultural activities. Volume 2 : appendices (Note 392) |
30 | Low flows and water resources : facts on the top 40 low flow rivers in England and Wales |