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by Antes, Ralf; Hansjurgens, Bernd; Letmathe, Peter
by Hansjurgens, Bernd; Antes, Ralf
by Antes, Ralf; Hansjurgens, Bernd; Letmathe, Peter; et al.
by Antes, Ralf; Hansjrgens, Bernd; Letmathe, Peter
by Antes, Ralf; Hansjürgens, Bernd; Letmathe, Peter; et al.
by Ralf Antes; ?Bernd Hansjürgens; ?Peter Letmathe
by Reinhard Pfriem; Ralf Antes; Klaus Fichter
