Tacke, J. [P:(DE-82)025465] ; Speetzen, R. [P:(DE-82)026164] ; Bücker, A. [P:(DE-82)025220] ; Adam, Gerhard [P:(DE-82)025225] ; Heschel, I. [P:(DE-82)026157] ; Schorn, R. [P:(DE-82)038501] ; Rau, Günter [P:(DE-82)004250] ; van Vaals, J. J. [P:(DE-82)195951] ; Günther, Rolf W. [P:(DE-82)000205]