1 | Analysis of benthic macro-invertebrate samples collected by the NRA during 1989 and 1990 from various habitats in the River Delph |
2 | The River Colne Estuary subtidal biological survey 1992 |
3 | A report on a baseline survey of the subtidal benthic communities within Portland Harbour (January 1997) |
4 | Thames estuary benthic programme : a site by site report on the results of macroinvertebrate surveys undertaken during 1990-91 |