76 | Report on US study tour of engineered wetlands for the treatment of waste water and mine drainage, March 1992 |
77 | Light scattering in sewage effluent: a study of the effects of angle of scatter an common light sources |
78 | Investigation into failures of the River Dalch from Canns Mill Bridge to below Lapford sewage treatment works (2001) |
79 | An investigation into possible causes of poor water quality at Nymphayes Bridge (R30D009) on the Gissage Lake |
80 | An investigation to determine if Deep Moor Landfill Site is causing an impact downstream in the Peagham Stream |
81 | Environmental Impacts of Alkylphenol Ethoxylates and Carboxylates. Part 1 Proposals for the Development of Environmental Quality Standards |