2151 | St Austell River and south Cornwall coastal streams catchment river water quality classification 1991 |
2152 | Green algae, |
2153 | Mallomonas, |
2154 | Herbarium Image: Lythrum salicaria |
2155 | Diatoms, |
2156 | Salmonid and freshwater fisheries statistics for England and Wales, 1990. |
2157 | Ulothrix, |
2158 | Cryptomonas |
2159 | Nassula, |
2160 | Herbarium Image: Ranunculus lingua |
2161 | Haematococcus, |
2162 | Herbarium Image: Samolus valerandi |
2163 | Peridinium, |
2164 | Triaenodes bicolor larva, |
2165 | Chrysolykos skujae |
2166 | Lichen, |
2167 | Woolacombe beach : tracer survey (1996) |
2168 | Herbarium Image: Potamogeton filiformis |
2169 | River Weirs - Good Practice Guide |
2170 | Herbarium Image: Galium palustre |
2171 | Synura, |
2172 | Peridinium, |
2173 | Pinnularia, |
2174 | Introductory guidance on the Agency's contribution to sustainable development (SD1) |
2175 | Paulinella, |