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by Kostler, Ursula; Marks, Heike; Schulz-Nieswandt, Frank; et al.
by Kern, Waldemar; Kunstler-Union, Koln; Sauerborn, Pralat Josef; et al.
by Not Available (NA)
by Seidler, Martin; Struck, Martin
by Unknown
by Rehbach, Conrad
by Schwer, Wilhelm
by Schmitz, Wilhelm
by Herion, Dieter
by Akademie Der Wissenschaften Zu Gottingen