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Hits 1-3 within 3 documents
Author(s): Johne, F.; Kasek, Leonhard; Rochlitz, Manfred.- 1987. 38p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1989. 37p.
Author(s): Kasek, Leonhard.- 1980. 21p.