TY - Generic T1 - Long-term trends in stream chemistry and biology in Northeast Scotland: Evidence for recovery Y1 - 1996 A1 - Soulsby, C. A1 - Turnbull, D. A1 - Langan, S.J. A1 - Owen, R. A1 - Hirst, D. JF - Water, Air and Soil Pollution VL - 85 ER -