| 6826 | River Fal catchment river water quality classification 1990 |
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| 6827 | River Fal catchment river water quality classification 1991 |
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| 6828 | River Par and Crinnis catchment river water quality classification 1990 |
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| 6829 | River Par and Crinnis catchment river water quality classification 1991 |
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| 6830 | St Austell River and south Cornwall coastal streams catchment river water quality classification 1990 |
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| 6831 | The identification and investigation of a dinoflagellate bloom in Mounts Bay, Cornwall |
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| 6832 | A draft code of practice for analytical quality control in National Rivers Authority laboratories |
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| 6833 | Control samples for ph determination in low ionic strength waters |
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| 6834 | Proposals to introduce operator monitoring assessment for emissions to air from processes regulated under integrated pollution control : consultation paper |
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| 6835 | Cryptosporidium in drinking water : survey of occurrence. June 1991 |
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| 6836 | River Cober catchment river water quality classification 1990 |
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| 6837 | Developing Quality Assurance for Fish Counter Data - Phase 1: An Assessment of the Salmonid Fish Counter Network in England and Wales |
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| 6838 | Quality assurance for phytoplankton data |
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| 6839 | Quality in Corporate Planning 1993 |
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| 6840 | STREAM thematic network : standards, measurement, testing and research in environmental instrumentation and monitoring |
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| 6841 | Annual N2O measurements and associated data: AC0213, Devon, 2012 |
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| 6842 | Evaluation of a YSI-6000 submersible water quality monitor |
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| 6843 | Evaluation of an ELE/pHOX sub-logger submersible water quality monitor |
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| 6844 | Blue-green algal survey of Lower Clicker Quarry |
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| 6845 | Development of a field test kit for detection of blue-green algal toxins (348/02/A) : interim progress report |
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| 6846 | European collaboration to develop standard sediment toxicity test methods (396/4/T) : interim report |
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| 6847 | The application of toxicity-based criteria for the regulatory control of wastewater discharges: a consultation document |
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| 6848 | Atlantic Salmon Trust Winter Journal 2005/2006 |
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| 6849 | Acid Waters: Llyn Brianne Project- Project Record |
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| 6850 | Development of a field test kit for detection of blue-green algal toxins (348/01/A) : interim progress report |
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