Zimmermann, Egon [P:(DE-Juel1)133962] ; Huisman, J. A. [P:(DE-Juel1)129472] ; Kemna, A. [P:(DE-HGF)0] ; Berwix, Joachim [P:(DE-Juel1)133866] ; Glaas, Walter [P:(DE-Juel1)133890] ; Meier, Heinrich [P:(DE-Juel1)133914] ; Wolters, Bernd [P:(DE-Juel1)133958] ; Esser, Odilia [P:(DE-Juel1)129450]