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by Wiggering, Hubert; Ende, Hans-Peter; Knierim, Andrea; et al.
by Helming, Katharina; Wiggering, Hubert
by Mander, Ulo; Wiggering, Hubert; Helming, Katharina
by Wiggering, Hubert; Muller, Felix
by Katharina Helming; ?Hubert Wiggering
by M. Huch; ?Hubert Wiggering; ?H. Geldmacher