Hits 1-4 within 4 documents
Hits 1-4 within 4 documents
Author(s): Nau, Anke; Porst, Rolf.- 1992. 129p.
Author(s): Porst, Rolf; Jers, Cornelia.- 2005. 27p.
Author(s): Brückner, Erika; Kirschner, Hans-Peter; Porst, Rolf; Prüfer, Peter; Schmidt, Peter.- 1982. 40p.
Author(s): Klein, Sabine; Porst, Rolf.- 2000. 36p.