%0 Generic %D 1985 %T The effects of air-borne ammonium sulphate on Pinus nigra in the Netherlands %A Roelofs, J.G.M. %A Kempers, A.J. %A Houdijk, A.L.F.M. %A Jansen, J. %B Plant Soil %V 42 %P 372–377 %G eng