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3101Herbarium Image: Apium nodiflorum
3102Diagnostic Drawing: Diatoms freshwater pennales,
3103Herbarium Image: Vulpia bromoides and Aira caryophyllea
3104Diagnostic Drawing: Coccolithophorids,
3105Chlorella,
3106Sapiston River support scheme : test pumping of observation boreholes (92/6/362)
3107Rivers and wetlands : best practice guidelines
3108National Rivers Authority/Po River Basin Authority collaboration programme : (collection of documents)
3109Sources of farm pollution and impact on river quality : interim report (001/6/W)
3110Diagnostic Drawing: Cocolith types,
3111Herbarium Image: Achillea ptarmica
3112New style charging schemes for discharges and abstractions (Note 16)
3113Proposed scheme of abstraction charges 1993-94
3114Flood risk management in North Wessex area : be prepared for flooding
3115The National Rivers Authority employee attitude survey : summary
3116The Use of a Hydroacoustic Counter for Assessing Salmon Stocks
3117Factors affecting natural smolt production
3118The disposal of sheep dip waste (R and D Report 11) : effects on water quality
3119Dugesia tigrina,
3120Herbarium Image: Potamogeton berchtoldii
3121Diagnostic Drawing: Chaetophora and related genera,
3122Geochemical process modelling : progress report for the period Jan - March 1993 (0295/11/A)
3123Pesticides in the aquatic environment 1997 : executive summary
3124Diagnostic Drawing: Codiaceae,
3125River quality classification 1985-1990 : reasons for non-compliance