1801 | Cladophora-ball, |
1802 | Xanthidium, |
1803 | Herbarium Image: Lythrum portula subsp. longidentata |
1804 | Euglena, |
1805 | Disposal of sewage where no mains drainage is available -Environment Agency- |
1806 | Oedogonium, |
1807 | Upper Lee catchment management plan : consultation report summary : March 1994 |
1808 | Herbarium Image: Huperzia selago |
1809 | Herbarium Image: Chara globularis |
1810 | Unknown chytrid |
1811 | Closterium, |
1812 | Stigeoclonium, |
1813 | Cosmarium |
1814 | Staurastrum |
1815 | Dictyosphaerium, |
1816 | Vampyrella, |
1817 | Herbarium Image: Carex flava |
1818 | Unnamed chytrid |
1819 | Herbarium Image: Potamogeton perfoliatus |
1820 | Synura, |
1821 | Strategic Land Use Planning Europe and USA: Review of Best Practice for the Environment Agency, Vol. 2 - Country Studies including Information from France, Germany, Netherlands, Portugal and USA |
1822 | Melosira, |
1823 | Flood defence law 1992 |
1824 | Genetics and ecology of spined loach in England: implications for conservation management |
1825 | Herbarium Image: Tolypella nidifica |