[ نُشرت في: Pollution ]
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Long-term changes in forest soil acidity in Pennsylvania, U.S.A.
1997
Drohan, J.R. (Pennsylvania State Univ., University Park, PA (USA).) | Sharpe, W.E.
Wageningen University & Research - Netherlands
Effects of watershed liming on Picea rubens seedling biomass and nutrient element concentration
1997
Smallidge, P.J. (Frostburg State Univ., Frostburg, MD (USA). Dept. of Biology) | Leopold, D.J.
Wageningen University & Research - Netherlands