@article {227, title = {Zeigerwerte von Pflanzen in Mitteleuropa}, journal = {Scripta Geobotanica}, volume = {18}, year = {1991}, pages = {1-248}, author = {Ellenberg, H. and Weber, H.E. and Dull, R. and Wirth, V. and Werner, W. and Pauli{\ss}en, D.} }