TY - Generic T1 - Forest decline, nutrient supply and diagnostic fertilisation in southwestern Germany and in southern California. Y1 - 1990 A1 - Huettl, R.F. A1 - Fink, S. A1 - Lutz, H.J. A1 - Poth, M. A1 - Wisniewski, J. JF - Forest Ecology and Management VL - 30 ER -