TY - Generic T1 - Ammonia concentrations at a site in southern Scotland from 2 yr of continuous measurements Y1 - 1998 A1 - Burkhardt, J. A1 - Sutton, M.A. A1 - Milford, C. A1 - Storeton-West, R.L. A1 - Fowler, D. JF - Atmospheric Environment VL - 32 ER -