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[Ecological effects and silvicultural conception of continuous pollution stress in Northern Federal Republic of Germany]
1987
Otto, H.J. (Niedersaechsisches Ministerium fuer Ernaehrung, Landwirtschaft und Forsten, Hannover (Germany, F.R.))
ZB MED Nutrition. Environment. Agriculture - Germany
The dependence of the success of natural regeneration on upper soil conditions and degree of acidity in declined forest stands of the Black Forest
1992
Littek, T. (Freiburg Univ. (Germany). Waldbau-Institut)
ZB MED Nutrition. Environment. Agriculture - Germany