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6401Herbarium Image: Persicaria amphibia
6402Herbarium Image: Schoenoplectus lacustris
6403Herbarium Image: Schoenoplectus tabernaemontani
6404A report on the use of pesticides at two Hampshire watercress farms
6405Porth, Gluvian and Menalhyl catchment river water quality classification 1990
6406River Cober catchment river water quality classification 1991
6407River Fal catchment river water quality classification 1990
6408River Fal catchment river water quality classification 1991
6409River Par and Crinnis catchment river water quality classification 1990
6410River Par and Crinnis catchment river water quality classification 1991
6411St Austell River and south Cornwall coastal streams catchment river water quality classification 1990
6412The identification and investigation of a dinoflagellate bloom in Mounts Bay, Cornwall
6413A draft code of practice for analytical quality control in National Rivers Authority laboratories
6414Control samples for ph determination in low ionic strength waters
6415Proposals to introduce operator monitoring assessment for emissions to air from processes regulated under integrated pollution control : consultation paper
6416Cryptosporidium in drinking water : survey of occurrence. June 1991
6417River Cober catchment river water quality classification 1990
6418Developing Quality Assurance for Fish Counter Data - Phase 1: An Assessment of the Salmonid Fish Counter Network in England and Wales
6419Quality assurance for phytoplankton data
6420Quality in Corporate Planning 1993
6421STREAM thematic network : standards, measurement, testing and research in environmental instrumentation and monitoring
6422Annual N2O measurements and associated data: AC0213, Devon, 2012
6423Evaluation of a YSI-6000 submersible water quality monitor
6424Evaluation of an ELE/pHOX sub-logger submersible water quality monitor
6425Blue-green algal survey of Lower Clicker Quarry