| 501 | River Usk barrage position statement, 18th January 1991 |
|---|
| 502 | Exe freshwater model : quasar model design |
|---|
| 503 | A Post Mortem Study of Otters (Lutra Lutra) Found Dead in South West England |
|---|
| 504 | Catchment handbook : River Camel catchment : final draft report |
|---|
| 505 | Macroinvertebrates of the River Nar : Great Ouse catchment : draft report |
|---|
| 506 | Regional water quality monitoring and surveillance programme for 1992 : quality investigations in controlled waters |
|---|
| 507 | Rainfall-runoff and other modelling for ungauged/low-benefit locations |
|---|
| 508 | River Glen : river channel assessment : main report |
|---|
| 509 | Groundwater development scheme : Little Ouse and Thet catchment : control rules |
|---|
| 510 | Health and ecotoxicology of otters: summary of four studies from 1988-2003 |
|---|
| 511 | River Lynher catchment river water quality classification 1990 |
|---|
| 512 | The Role Of Bankside Habitat In River Ecology |
|---|
| 513 | CATCH Autumn 2003 |
|---|
| 514 | Mesotrophic rivers in Anglian region : progress report 4 December 1995 |
|---|
| 515 | Biological characteristics and exploitation of sea trout in the River Tywi during 1989 |
|---|
| 516 | Delabole Stream (abandoned minewater) water quality investigation (total zinc) |
|---|
| 517 | Further Development and Testing Of Artificial Intelligence Systems for the Classification and Diagnosis of River Quality Based on Biological and Environmental Data |
|---|
| 518 | River Strat catchment river water quality classification 1990 |
|---|
| 519 | Regional water quality monitoring and surveillance programme for 1993 : biological assessment of rivers : draft report |
|---|
| 520 | Low Flow Frequency Analysis Guidelines for Best Practice |
|---|
| 521 | Quarterly review : Southern region 1993/94 Apr - Sep 1993 |
|---|
| 522 | River Glen : river channel assessment : annex E : instream habitat assessment of the River Glen, Lincolnshire |
|---|
| 523 | Fishing in the South |
|---|
| 524 | Lower Nene : options for resources : environmental asset survey : baseline report : final |
|---|
| 525 | Water - nature's precious resource : comparative environmental appraisal of strategic options. vol. 2 appendices : supplementary report no. 8 |
|---|
