1 | Method for the assessment of river water quality using benthic macroinvertebrates |
2 | Alternative Methods For The Biological Classification Of Rivers |
3 | Guidance on the Development of Typology and Classification Systems for Transitional and Coastal Waters |
4 | Regional river quality monitoring and surveillance : results of the 1990/1991 biological survey : draft report |
5 | Analysis of natural and polluted river communities in Great Britain- Progress report for the period April 1984- March 1988
|