1 | Biological investigation into the impact of the storm overflow at Middle Marwood Sewage Treatment Works |
2 | Biological Assessment Methods: Controlling the Quality of Biological Data. Package 1 The variability of data used for assessing the biological condition of rivers |
3 | Analysis of benthic macro-invertebrate samples collected by the NRA during 1989 and 1990 from various habitats in the River Delph |
4 | Guidance on the use of Bioassays in Ecological Risk Assessment |
5 | Stream survey and assessment in the Ashford and Folkestone areas |
6 | Environmental assessment of selected abandoned minewaters in the North East region |
7 | A Proposed Scheme To Ensure The Quality Of Data Generated By Laboratories Undertaking Regulatory Ecotoxicological Testing |