Blömers, Ch. [P:(DE-Juel1)VDB98880] ; Lepsa, M.I. [P:(DE-Juel1)VDB98883] ; Grap, Th. [P:(DE-Juel1)VDB98882] ; Schäpers, Th. [P:(DE-Juel1)128634] ; Lüth, H. [P:(DE-Juel1)VDB975] ; Grützmacher, D. [P:(DE-Juel1)125588]