1626 | Herbarium Image: Carex nigra |
1627 | Enteromorpha, |
1628 | Environment Agency guidance on the conditioning of intermediate level waste |
1629 | River Tyne drinking water intake risk assessment |
1630 | Herbarium Image: Nasturtium officinale |
1631 | Water pollution incidents in England and Wales 1994 : report of the National Rivers Authority |
1632 | Herbarium Image: Potamogeton berchtoldii |
1633 | Scytonema, |
1634 | Herbarium Image: Undetermined |
1635 | Quality audit of biological samples for the 1991 river quality survey |
1636 | Tribonema, |
1637 | HIDDEN-DP-WHPearsall-001.tif |
1638 | Cladophora-ball, |
1639 | Xanthidium, |
1640 | Herbarium Image: Lythrum portula subsp. longidentata |
1641 | Euglena, |
1642 | Disposal of sewage where no mains drainage is available -Environment Agency- |
1643 | Oedogonium, |
1644 | Herbarium Image: Huperzia selago |
1645 | Herbarium Image: Chara globularis |
1646 | Unknown chytrid |
1647 | Closterium, |
1648 | Stigeoclonium, |
1649 | Cosmarium |
1650 | Staurastrum |