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Hits 1-4 within 4 documents
Author(s): Schmidt, Harald; Lauer, Guido.- 1985. 95p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1987. 42p.
Author(s): Bathke, Gustav-Wilhelm.- 1986. 121p.
Author(s): Schmidt, Harald.- 1984. 44p.